wip(build): make TS target ESNext and let babel handle ES features

Author: FranckFreiburger

build/tsconfig.json

@@ -2,8 +2,8 @@
 	"compilerOptions": {
 		"noImplicitAny": true,
 		"allowJs": true,
-		"module": "es6",
-		"target": "es6",
+		"module": "ESNext",
+		"target": "ESNext",
 		"moduleResolution": "node"
 	}
 }