Upgrade to electron@^19 (#5369)

* Upgrade to use electron 19.0.4

- Update documentation

- Updated disturl in .yarnrc to fix build issue

- Remove use of abort-controller package

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Remove support for webview tags

Signed-off-by: Sebastian Malton <sebastian@malton.name>

Signed-off-by: Sebastian Malton <sebastian@malton.name>

docs/extensions/get-started/anatomy.md

@@ -55,7 +55,7 @@ Some of the most-important fields include:
   "license": "MIT",
   "homepage": "https://github.com/lensapp/lens-extension-samples",
   "engines": {
-    "node": "^14.18.12",
+    "node": "^16.14.2",
     "lens": "5.4"
   },
   "main": "dist/main.js",
@@ -72,7 +72,7 @@ Some of the most-important fields include:
     "ts-loader": "^8.0.4",
     "typescript": "^4.5.5",
     "@types/react": "^17.0.44",
-    "@types/node": "^14.18.12",
+    "@types/node": "^16.14.2",
     "webpack": "^4.44.2",
     "webpack-cli": "^3.3.11"
   }