Update several dependencies, remove a few as well

.github/workflows/snyk.yml

@@ -1,28 +0,0 @@
-# Copyright 2020-2021 Signal Messenger, LLC
-# SPDX-License-Identifier: AGPL-3.0-only
-
-name: Snyk
-on:
-  schedule:
-    - cron:  '0 12 * * *'
-
-jobs:
-  snyk:
-    runs-on: ubuntu-latest
-    if: github.repository != 'signalapp/Signal-Desktop'
-
-    steps:
-    - run: lsb_release -a
-    - run: uname -a
-    - uses: actions/checkout@v2
-    - uses: actions/setup-node@v2
-      with:
-        node-version: '16.5.0'
-    - run: npm install -g yarn@1.22.10
-    - run: npm install -g snyk@1.316.1
-
-    - run: yarn install --frozen-lockfile
-    - run: snyk auth "$SNYK_TOKEN"
-      env:
-        SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
-    - run: snyk test --show-vulnerable-paths=all