Moves libtextsecure to Typescript

* Starting to work through lint errors

* libsignal-protocol: Update changes for primary repo compatibility

* Step 1: task_with_timeout rename

* Step 2: Apply the changes to TaskWithTimeout.ts

* Step 1: All to-be-converted libtextsecure/*.js files moved

* Step 2: No Typescript errors!

* Get libtextsecure tests passing again

* TSLint errors down to 1

* Compilation succeeds, no lint errors or test failures

* WebSocketResources - update import for case-sensitive filesystems

* Fixes for lint-deps

* Remove unnecessary @ts-ignore

* Fix inability to message your own contact after link

* Add log message for the end of migration 20

* lint fix

js/background.js

@@ -2349,7 +2349,7 @@
       sourceUuid: data.sourceUuid,
       sourceDevice: data.sourceDevice,
       sent_at: data.timestamp,
-      received_at: data.receivedAt || Date.now(),
+      received_at: Date.now(),
       conversationId,
       unidentifiedDeliveryReceived: data.unidentifiedDeliveryReceived,
       type: 'incoming',