Fix eslint settings
Extract big switch to Statement CodeGenenerator
Extract option variables into local variables
Move generateExpression's big switch to CodeGenerator's prototype
Add old escodegen for benchmarks
Use CodeGenerator.prototype as lookup table
Drop withIndent's call and return result

withIndent's result is not used.
Drop switch use
Remove unused variables
Add @inikulin copyrights
Drop option parameter in generatePropertyKey
Merge branch 'master' of github.com:estools/escodegen