pubspec: Upgrade sdk constraints to Dart 3.2 as minimum (#530)

* pubspec: Upgrade sdk constraints to Dart 3.2 as minimum

* Update test.yml to Dart 3.2

* Resolve issue found by analyzer

.github/workflows/test.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        tag: ['2.18']
+        tag: ['3.2']
 
     container:
       image:  dart:${{ matrix.tag }}

bin/create_exercise.dart

@@ -292,7 +292,7 @@ bool _containsWhitespaceCodes(String input) {
 String _determineBestReturnType(List<dynamic> specCases) {
   final expectedList = retrieveListOfExpected(specCases);
 
-  final dynamic first = expectedList != null && expectedList.isNotEmpty ? expectedList.first : null;
+  final dynamic first = expectedList.isNotEmpty ? expectedList.first : null;
 
   if (first is Iterable) {
     final iterableType = '${_getIterableType(first)}';

exercises/concept/futures/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'futures'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/concept/numbers/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'numbers'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/concept/strings/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'strings'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/acronym/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'acronym'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/allergies/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'allergies'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/anagram/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'anagram'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/armstrong-numbers/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'armstrong_numbers'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/beer-song/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'beer_song'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/binary-search-tree/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'binary_search_tree'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/bob/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'bob'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/collatz-conjecture/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'collatz_conjecture'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/darts/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'darts'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/diamond/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'diamond'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/difference-of-squares/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'difference_of_squares'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/forth/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'forth'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/gigasecond/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'gigasecond'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/grains/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'grains'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/hamming/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'hamming'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/hello-world/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'hello_world'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/high-scores/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'high_scores'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/isbn-verifier/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'isbn_verifier'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/isogram/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'isogram'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/leap/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'leap'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/luhn/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'luhn'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/matching-brackets/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'matching_brackets'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/minesweeper/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'minesweeper'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/nth-prime/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'nth_prime'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/pangram/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'pangram'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/pascals-triangle/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'pascals_triangle'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/phone-number/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'phone_number'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/pig-latin/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'pig_latin'
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/prime-factors/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'prime_factors'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/raindrops/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'raindrops'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/resistor-color-duo/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'resistor_color_duo'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/resistor-color/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'resistor_color'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/reverse-string/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'reverse_string'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/rna-transcription/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'rna_transcription'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/robot-simulator/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'robot_simulator'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/roman-numerals/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'roman_numerals'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/scrabble-score/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'scrabble_score'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/secret-handshake/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'secret_handshake'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/space-age/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'space_age'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/sum-of-multiples/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'sum_of_multiples'
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/triangle/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'triangle'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/two-fer/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'two_fer'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'

exercises/practice/word-count/pubspec.yaml

@@ -1,5 +1,5 @@
 name: 'word_count'
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.2.0 <4.0.0'
 dev_dependencies:
   test: '<2.0.0'