fix(infra): build and publish if there are commits since last night (s…

…jbarag#634)

I negated all of those `if` properties.  Whooooops

.github/workflows/nightly-build.yaml

@@ -20,19 +20,19 @@
         {
           name: "Set up node 12",
           uses: "actions/setup-node@v1",
-          if: "${{ job.commits_since_last_nightly.outcome == 'failure' }}",
+          if: "${{ job.commits_since_last_nightly.outcome == 'success' }}",
           with: {
             registry-url: "https://registry.npmjs.com",
             node-version: "12"
           }
         },
         {
           run: "yarn",
-          if: "${{ job.commits_since_last_nightly.outcome == 'failure' }}"
+          if: "${{ job.commits_since_last_nightly.outcome == 'success' }}"
         },
         {
           run: "yarn publish --no-git-tag-version --new-version `node scripts/getNightlyVersion.js` --tag nightly",
-          if: "${{ job.commits_since_last_nightly.outcome == 'failure' }}",
+          if: "${{ job.commits_since_last_nightly.outcome == 'success' }}",
           env: {
             NODE_AUTH_TOKEN: "${{ secrets.NPM_PUBLISH_TOKEN }}"
           }