Add Ruby Installer 2.6.1, 2.6.2, 2.6.3#31

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sansoohan wants to merge 6 commits intonak1114:developfrom

sansoohan:master

Commits on Jan 30, 2019

Fix #15
nak1114
committed

Commits on Feb 2, 2019

Fix #16 and #17
kkotari
committed
Merge pull request #19 from pyenv-win/master
nak1114
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Commits on Feb 3, 2019

calling rehash by default after install
kkotari
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Commits on Feb 10, 2019

Merge pull request #21 from pyenv-win/auto_rehashing
nak1114
authored

Commits on Nov 24, 2019

Add Ruby Installer 2.6.1, 2.6.2, 2.6.3
sansoohan
authored