Close window on addon removal (#987)

* Fix links in changelog (#977)

* Update non breaking dependencies (#985)

- addons-linter
- eslint-plugin-mozilla
- eslint-plugin-react
- husky
- react-player
- webpack

Also needed to add a new dep:
- eslint-no-unsanitized

Looks like this is a dep of eslint-plugin-mozilla that isn't listed correctly in the
eslint-plugin-mozilla package. This package is for some reason bundled in with gecko
so I do not have the time to contribute a fix at this time. Hopefully I will find
the time later.

* Close window on addon removal

- fixes #970

bootstrap.js

@@ -61,6 +61,7 @@ function startup(data, reason) { // eslint-disable-line no-unused-vars
 }
 
 function shutdown(data, reason) { // eslint-disable-line no-unused-vars
+  closeWindow();
   LegacyExtensionsUtils.getEmbeddedExtensionFor({
     id: ADDON_ID,
     resourceURI: data.resourceURI