make sure gc cant free temp variables

checkout latest commit from argon2

Merge branch 'master' of https://github.com/Asmod4n/mruby-argon2

make it compile and pass tests on windows

Update ruby.yml

Update ruby.yml

Update ruby.yml

freeze Default arguments

Create ruby.yml

Merge pull request #1 from rcheung2015/feature/use_mruby3_presym

revise the condition to check mRuby version

use preallocated symbol if mRuby version is 3.0 or above

Merge branch 'master' of https://github.com/Asmod4n/mruby-argon2

Update wording to reflect mruby 3 changes

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