- Linting (ESLint): Remove now unneeded config and add per new update

- Refactoring: Prefer for-of, event.key (newly enforced linting)
- Refactoring: Better var. names
- npm: Update devDeps and update local copies

CHANGES.md

@@ -7,6 +7,7 @@
 - Enhancement: Added `avoidClientSideOpen` config for
     `ext-server_opensave.js`
 - Refactoring: Use `static` keyword for classes
+- Build: Remove `types-docs` script as being handled in ESLint
 - npm: Update devDeps (including switching from deprecate opn-cli
     package to open-cli)