* feat(typescript): support for conditonal types
* refactor(js): reuse conditional expression logic
* chore(typescript): update snapshot for typescript conditional type test suite
* chore(js): make code support Node 4
* chore(js): rename utility functions
* chore(js): add comments for formatTernaryOperator
* fix(ts): support infer keyword
* chore(js): new line
* chore(js): improve readablity a little bit
Sosuke Suzuki