Bump typescript from 3.5.3 to 3.8.3 (#2513)

* Bump typescript from 3.5.3 to 3.8.3

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.5.3 to 3.8.3.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.5.3...v3.8.3)

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

* update node types as well

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Tyler James Leonhardt <tylerl0706@gmail.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -52,7 +52,7 @@
     "@types/glob": "^7.1.1",
     "@types/mocha": "~7.0.2",
     "@types/mock-fs": "~4.10.0",
-    "@types/node": "~10.11.0",
+    "@types/node": "~12.12.39",
     "@types/node-fetch": "~2.5.7",
     "@types/rewire": "~2.5.28",
     "@types/semver": "~7.1.0",
@@ -65,7 +65,7 @@
     "rewire": "~5.0.0",
     "sinon": "~9.0.2",
     "tslint": "~6.1.2",
-    "typescript": "~3.5.3",
+    "typescript": "~3.8.3",
     "vsce": "~1.75.0",
     "vscode-test": "~1.3.0"
   },