- Linting: As per latest ash-nazg

- Docs: Add feature and PR templates
- npm: Update devDeps.

.github/pull_request_template.md

@@ -0,0 +1,15 @@
+## PR description
+
+<!-- Add the description of your PR here -->
+
+
+## Checklist
+
+Note that we require UI tests to ensure that the added feature will not be
+nixed by some future fix and that there is at least some test-as-documentation
+to indicate how the fix or enhancement is expected to behave.
+
+- [ ] - Added Cypress UI tests
+- [ ] - Ran `npm test`, ensuring linting passes and that Cypress UI tests keep
+        coverage to at least the same percent (reflected in the coverage badge
+        that should be updated after the tests run)