Fix #46 Upgrade to latest typescript (4.7.4) and latest ts-node (10.8.1)

Author: rlubke

package-lock.json

@@ -23,8 +23,8 @@
     "mocha": "^10.0",
     "nyc": "^15.0.1",
     "source-map-support": "^0.5.19",
-    "ts-node": "^9.1.1",
-    "typescript": "^3.9.7"
+    "ts-node": "^10.8",
+    "typescript": "^4.7"
   },
   "scripts": {
     "grpc": "bin/npm-post-install.sh",

package.json

@@ -541,7 +541,7 @@ export namespace event {
       if (!self.markedForClose && self.streamPromise != null) {
         self.markedForClose = true
         const bidiStream = await self.streamPromise
-        await new Promise(async (resolve) => {
+        await new Promise<void>(async (resolve) => {
           // Setup an event handler for 'error' as calling cancel() on
           // the bidi stream will result in a CANCELLED status.
           bidiStream.on('error', (err) => {