v0.7.3

Enhancements

• Allow matching requests by headers (#56).

Changes

• Fix error at [mix vcr] task when cassette directory does not exist (skip instead of raising errors).
  • Running mix vcr without custom cassette folder gives annoying message (#49).
• Fix for duplicated/unnecessary directory creation.
  • Fix configuring cassette_library_dir (#50).
• Fix cached status code for ibrowse (#57).