Increase deprecation level for previously deprecated API

- unsupported common exceptions
- common 'synchronized'
- jquery API
- experimental kotlin.time API
- js Math object
- DefaultAsserter constructor-like fun

js/js.translator/testData/webDemoCanvasExamples/Creatures.kt

@@ -3,6 +3,8 @@
  * You can drag'n'drop them as well as the logo. Doubleclick to add
  * more creatures but be careful. They may be watching you!
  */
+@file:Suppress("DEPRECATION_ERROR")
+
 package creatures
 
 import jquery.*