Fix vm2 vulnerability: remove superagent-proxy dependency (#830)

* Fix vm2 vulnerability

* Remove superagent-proxy dep completely and use proxy-agent directly

* Update typescript

* Update node version on CI

Author: DmitriyKirakosyan

.github/workflows/code-push-ci.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Setup NodeJs
         uses: actions/setup-node@v1
         with:
-          node-version: '12.x'
+          node-version: '14.x'
       - name: Setup dependencies
         run: npm run setup
       - name: Build