Implement typescript for several branches & adjust configuration (#1750)

Implements typescript support for: @onflow/rlp, @onflow/util-uid, @onflow/util-template, @onflow/util-logger, @onflow/util-invariant, @onflow/util-encode-key, @onflow/util-address

Author: jribbink

.changeset/fifty-buttons-serve.md

@@ -0,0 +1,5 @@
+---
+"@onflow/fcl-bundle": minor
+---
+
+Switched to rollup-plugin-typescript2

.changeset/giant-ducks-tickle.md

@@ -0,0 +1,11 @@
+---
+"@onflow/util-encode-key": minor
+"@onflow/util-invariant": minor
+"@onflow/util-template": minor
+"@onflow/util-address": minor
+"@onflow/util-logger": minor
+"@onflow/util-uid": minor
+"@onflow/rlp": minor
+---
+
+Convert to Typescript