.x versions for devDependencies
Fix tests
Add toSignedDecimalString() and toUnsignedDecimalString()
Fix package.json
Merge branch 'fix-tests' of https://github.com/codeaholics/node-int64-native
Merge branch 'decimal-strings' of https://github.com/codeaholics/node-int64-native
Merge branch 'fix-package' of https://github.com/codeaholics/node-int64-native