v1.7.2

@jwillemsen

What's Changed

Update parser.rb, fixed typo by @jwillemsen in #224
Remove leading newline from on_error exception messages. by @zenspider in #226
Add --frozen to add frozen_string_literals to top of generated files. by @zenspider in #225
Update development dependency to avoid ruby 2.5 failures by @flavorjones in #228
dep: pin development dependencies, and enable dependabot for gems by @flavorjones in #229
Clean embedded pragmas by @nobu in #230
Embed grammar file name into generated file by @yui-knk in #231
Bump actions/checkout from 3 to 4 by @dependabot in #232
Fix a typo by @yui-knk in #234
Add "Release flow" to README.rdoc by @yui-knk in #235
Prepare 1.7.2 by @nobu in #236
Remove install guide by setup.rb by @yui-knk in #237
Fix tiny typos by @makenowjust in #238
Remove old checks by @nobu in #240
Remove MANIFEST which was used by ancient extmk.rb by @nobu in #242
Extract Racc::VERSION from racc/info.rb at extconf.rb by @nobu in #241
Use prototype declarations by @nobu in #243
Bump up v1.7.2 by @yui-knk in #239

Full Changelog: v1.7.1...v1.7.2