Build: Force prerelease peer dep for Node 16 in CI (#14933)

* Build: Force prerelease peer dep for Node 16 in CI

Several dev dependencies have a peer dependency on the local ESLint.
Prereleases don't satisfy regular version range constraints, so the new
peer dependency resolution algorithm in Node 16 rejects `v8.0.0-beta.0`
as a valid peer dependency. Until we're done with prereleases, we can
use the `--force` flag to force npm to accept that the prerelease
satisfies the peer dependency.

* Add todo comment to remove Node 16 --force branching

.github/workflows/ci.yml

@@ -42,6 +42,11 @@ jobs:
         node-version: ${{ matrix.node }}
     - name: Install Packages
       run: npm install
+      # TODO(btmills): Remove Node 16 --force branching after releasing v8.0.0 final.
+      if: ${{ !startswith(matrix.node, '16') }}
+    - name: Install Packages
+      run: npm install --force
+      if: ${{ startswith(matrix.node, '16') }}
     - name: Test
       run: node Makefile mocha
     - name: Fuzz Test