- Breaking change: Switch from deprecated @babel/polyfill to

`core-js-bundle` and `regenerator-runtime` replacements
- Fix: Fully redirect extension entrances for lacking browser support
- Docs: Simplify comments in HTML files re: script purposes
- Docs: Update release instructions
- npm: Update devDeps (jsdoc, security audit)
- npm: Bump to 5.0.0

docs/versions/4.0.0.md

@@ -8,7 +8,7 @@ Some API changes also involve switching to class methods over instance
 methods, though these were private/internally used APIs.
 
 Please see the CHANGES file (or the Git history or Github tracker) for
-fixes and enhancements.
+more fixes and enhancements.
 
 ## Breaking changes
 

docs/versions/5.0.0.md

@@ -0,0 +1,17 @@
+# Version 5.0.0
+
+This release should require minimal updating.
+
+Contains a few fixes for PHP-related extensions.
+
+Please see the CHANGES file (or the Git history or Github tracker) for
+more fixes and enhancements.
+
+## Breaking changes
+
+- The HTML files have switched from the now deprecated `@babel/polyfill`
+    to `core-js-bundle` and `regenerator-runtime` replacements. If you
+    have not modified the HTML and are updating via npm, this change
+    should have no effect. (`@babel/polyfill` is still required through
+    some of the dependencies, but this is expected to eventually change.)
+- If you are running build files, you will now need at least Node 8.5