[MERGE #2045 @dilijev] Update version to 1.3.1 (set PATCH_VERSION to 1).
[MERGE #2045 @dilijev] Update version to 1.3.1 (set PATCH_VERSION to 1).

Merge pull request #2045 from dilijev:v131

Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore