ESLint upgrade, implement additional rules (#3230)

* upgrade to ESLintv7, added overrides for rules violated
* removed overrides for spec files
* fixed no-prototype-builtins issues
* added rules for default-case-last, default-param-last, grouped-accessor-pairs, no-constructor-return, and added override for one violation

Co-authored-by: Andrew Henry <akhenry@gmail.com>
Co-authored-by: Shefali Joshi <simplyrender@gmail.com>

example/scratchpad/src/ScratchPersistenceProvider.js

@@ -20,8 +20,6 @@
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 
-/*global define,window*/
-
 define(
     [],
     function () {