add Mrbtest::FIXNUM_{MAX,MIN,BIT}
test fixnum overflow for add, sub and mul
Fix Hash test
Rebuild no mrb_open mrbgems test when config file is modified.
Merge pull request #2240 from suzukaze/fix-hash-test

Fix Hash test
Merge pull request #2241 from take-cheeze/rebuild_irep

Rebuild no mrb_open mrbgems test when config file is modified.
convert &arg using to_proc; fix #2242
Merge branch 'master' of github.com:mruby/mruby
Merge pull request #2243 from yui-knk/fix-iso

Fix ISO No.
should not use String#<< which is defined in mruby-string-ext; use Array#join instead; ref #2239
Merge branch 'master' of github.com:mruby/mruby
add dependency information based on #2239; fix #2236, close #2239
protect argument array from GC in OP_ENTER
support comments in user-input; also add checks for buffer overflow
Merge pull request #2190 from cremno/mrbtest-mrb_int-constants

test fixnum overflow for add, sub and mul
remove unnecessary semicolons from a38f8f
Merge branch 'master' of github.com:mruby/mruby
should use mrb_type() for the sake of MRB_WORD_BOXING
Remove unnecessary newline in `OP_GETGLOBAL` codedump.
fix overflow error like #2244 on MRB_WORD_BOXING