[beta] need Oj compat mode, beta version bump
Merge pull request #479 from portertech/beta

[beta] need Oj compat mode, beta version bump
[beta] do not mutate previous_occurrence
[beta] new oj release, fixed rb_infinity on centos
Merge pull request #481 from portertech/beta

[beta] new oj release, fixed rb_infinity on centos