• Added optional template parameters to raw_string for rules that the content must match.
• Added new contrib rules rep_one_min_max and ellipsis.
• Fixed broken TAOCPP_PEGTL_KEYWORD macro.
• Fixed a bug in the contrib HTTP grammar which prevented it from parsing status lines in some cases.
• Fixed build with MinGW-w64 on Windows.
• Added automated testing with MinGW-w64.
• Added automated testing with GCC 7.