Upgrade to latest node-fetch

- Introduce injection tokens for retriving the implementation of
  node-fetch via await import() calls

- Add webpack file for compiling node-fetch to electron-renderer single
  file format

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

Makefile

@@ -53,6 +53,7 @@ integration: build
 
 .PHONY: build
 build: node_modules binaries/client
+	yarn run compile:node-fetch
 	$(MAKE) build-extensions -B
 	yarn run build:tray-icons
 	yarn run compile