Use the new cache service: upgrade @actions/cache to ^4.0.0 (#531)

* Use new cache service

* Add licensed output

* Review licenses & update types

.licenses/npm/twirp-ts.dep.yml

@@ -0,0 +1,11 @@
+---
+name: twirp-ts
+version: 2.5.0
+type: npm
+summary: Typescript implementation of the Twirp protocol
+homepage: 
+license: mit
+licenses:
+- sources: README.md
+  text: MIT <3
+notices: []