Bump typescript from 3.7.2 to 4.3.4 (#874)

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.7.2 to 4.3.4.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.7.2...v4.3.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

packages/alsatian/package.json

@@ -100,7 +100,7 @@
     "selenium-webdriver": "^3.0.1",
     "tslint": "^5.9.1",
     "tslint-plugin-prettier": "^1.3.0",
-    "typescript": "^3.0.1"
+    "typescript": "^4.3.4"
   },
   "dependencies": {
     "@types/node": ">=4.0.0",

packages/tap-bark/package.json

@@ -52,7 +52,7 @@
         "rimraf": "^3.0.0",
         "tslint": "^5.11.0",
         "tslint-plugin-prettier": "^1.3.0",
-        "typescript": "^3.5.2"
+        "typescript": "^4.3.4"
     },
     "nyc": {
         "all": true,

packages/vscode-extension/package.json

@@ -115,6 +115,6 @@
 		"less-loader": "^4.1.0",
 		"ts-node": "^10.0.0",
 		"tsconfig-paths": "^3.9.0",
-		"typescript": "^3.7.5"
+		"typescript": "^4.3.4"
 	}
 }