v5.2.0: Minor improvements

Features

• Using @babel as compiler
• Using UglifyJS as minifier
• Adding and Using @standard as linter

Refactoring

• Removing TypeScript, sorry :(
• Removing @gulpjs file, sorry :(
• Removing @eslint :(

Improvements

• 15% runtime performance improvements
• 75% faster compile time (including TS -> ES6 -> Bundle, as now ES6 -> Bundle)
• 5% better code readability