Adding parameter and response validation.

Adding prettier formatting support.
Add warning when no targets are selected.

src/process.ts

@@ -143,12 +143,16 @@ export default function startCompile(options: CompileOptions) {
       FS.writeFileSync(options.emitDefinitions, JSON.stringify(ir));
    }
 
+   if(options.targets.length <= 0) {
+      console.log(Color.yellow("WARNING:"), "No targets selected!");
+   }
+
    options.targets.forEach(target => {
       const tg = Targets.get(target.type) as any
       if(!tg) {
          console.log(Color.red("ERROR:"), "Target not supported!");
          return;
       }
-      compile(ir, new tg(target.output)); //TODO: implement
+      compile(ir, new tg(target.output));
    })
 }