Bump the MSRV further to Rust 1.60

Compiling the windows-sys package says:

    package `windows-sys v0.59.0` cannot be built because it requires rustc 1.60 or newer, while the currently active rustc version is 1.56.1

Oh well, if we're bumping the MSRV anyway ...

.appveyor.yml

@@ -3,10 +3,10 @@
   "build_script": ["cargo build"],
   "environment": {
     "matrix": [
-      {"target": "1.56.1-x86_64-pc-windows-msvc"},
-      {"target": "1.56.1-i686-pc-windows-msvc"},
-      {"target": "1.69.0-x86_64-pc-windows-msvc"},
-      {"target": "1.69.0-i686-pc-windows-msvc"},
+      {"target": "1.60.0-x86_64-pc-windows-msvc"},
+      {"target": "1.60.0-i686-pc-windows-msvc"},
+      {"target": "1.70.0-x86_64-pc-windows-msvc"},
+      {"target": "1.70.0-i686-pc-windows-msvc"},
       {"target": "beta-x86_64-pc-windows-msvc"},
       {"target": "beta-i686-pc-windows-msvc"},
       {"target": "nightly-x86_64-pc-windows-msvc"},

.github/workflows/build.yml

@@ -2,39 +2,39 @@
 {
   "env": {"CARGO_TERM_COLOR": "always"},
   "jobs": {
-    "native-1-56-1": {
+    "native-1-60-0": {
       "runs-on": "ubuntu-latest",
       "steps": [
         {"uses": "actions/[email protected]"},
         {
           "name": "Install toolchain",
-          "run": "rustup toolchain install 1.56.1\nrustup target add x86_64-unknown-linux-gnu --toolchain 1.56.1\n"
+          "run": "rustup toolchain install 1.60.0\nrustup target add x86_64-unknown-linux-gnu --toolchain 1.60.0\n"
         },
         {
           "name": "Build",
-          "run": "cargo +1.56.1 build --target x86_64-unknown-linux-gnu --verbose"
+          "run": "cargo +1.60.0 build --target x86_64-unknown-linux-gnu --verbose"
         },
         {
           "name": "Run tests",
-          "run": "cargo +1.56.1 test --target x86_64-unknown-linux-gnu --verbose"
+          "run": "cargo +1.60.0 test --target x86_64-unknown-linux-gnu --verbose"
         }
       ]
     },
-    "native-1-69-0": {
+    "native-1-70-0": {
       "runs-on": "ubuntu-latest",
       "steps": [
         {"uses": "actions/[email protected]"},
         {
           "name": "Install toolchain",
-          "run": "rustup toolchain install 1.69.0\nrustup target add x86_64-unknown-linux-gnu --toolchain 1.69.0\n"
+          "run": "rustup toolchain install 1.70.0\nrustup target add x86_64-unknown-linux-gnu --toolchain 1.70.0\n"
         },
         {
           "name": "Build",
-          "run": "cargo +1.69.0 build --target x86_64-unknown-linux-gnu --verbose"
+          "run": "cargo +1.70.0 build --target x86_64-unknown-linux-gnu --verbose"
         },
         {
           "name": "Run tests",
-          "run": "cargo +1.69.0 test --target x86_64-unknown-linux-gnu --verbose"
+          "run": "cargo +1.70.0 test --target x86_64-unknown-linux-gnu --verbose"
         }
       ]
     },
@@ -80,11 +80,11 @@
         {"uses": "actions/[email protected]"},
         {
           "name": "Install toolchain",
-          "run": "rustup toolchain install 1.56.1\nrustup target add x86_64-fortanix-unknown-sgx --toolchain 1.56.1\n"
+          "run": "rustup toolchain install 1.60.0\nrustup target add x86_64-fortanix-unknown-sgx --toolchain 1.60.0\n"
         },
         {
           "name": "Build",
-          "run": "cargo +1.56.1 build --target x86_64-fortanix-unknown-sgx --verbose"
+          "run": "cargo +1.60.0 build --target x86_64-fortanix-unknown-sgx --verbose"
         }
       ]
     },
@@ -94,11 +94,11 @@
         {"uses": "actions/[email protected]"},
         {
           "name": "Install toolchain",
-          "run": "rustup toolchain install 1.56.1\nrustup target add wasm32-unknown-unknown --toolchain 1.56.1\n"
+          "run": "rustup toolchain install 1.60.0\nrustup target add wasm32-unknown-unknown --toolchain 1.60.0\n"
         },
         {
           "name": "Build",
-          "run": "cargo +1.56.1 build --target wasm32-unknown-unknown --verbose"
+          "run": "cargo +1.60.0 build --target wasm32-unknown-unknown --verbose"
         }
       ]
     }

build.rcl

@@ -3,11 +3,11 @@
 // Rebuild the files by running `rcl build`.
 
 // The minimum supported Rust version (MSRV).
-let msrv = "1.56.1";
+let msrv = "1.60.0";
 
 // All of the Rust versions that we want to test on CI.
 // We pick the MSRV, beta and nightly, and one version somewhat in between.
-let rust_versions = [msrv, "1.69.0", "beta", "nightly"];
+let rust_versions = [msrv, "1.70.0", "beta", "nightly"];
 
 let banner = "# This file is generated from build.rcl.";
 

rust-toolchain.toml

@@ -1,3 +1,3 @@
 # This file is generated from build.rcl.
 [toolchain]
-channel = "1.56.1"
+channel = "1.60.0"