Update dev tooling and related docs

.github/workflows/lightstep.yml

@@ -1,29 +0,0 @@
-name: Verify Pre-Deploy Status
-
-on: pull_request
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    steps:
-      # Checkout repo
-      - name: Checkout
-        uses: actions/checkout@v2
-
-      # Run checks
-      - name: Lightstep Pre-Deploy Check
-        uses: lightstep/lightstep-action-predeploy@v0.2.6
-        id: lightstep-predeploy
-        with:
-          lightstep_api_key: ${{ secrets.LIGHTSTEP_API_KEY }}
-          pagerduty_api_token: ${{ secrets.PAGERDUTY_API_TOKEN }}
-
-      # Output status as a comment
-      - name: Add a Comment
-        uses: unsplash/comment-on-pr@master
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          msg: ${{ steps.lightstep-predeploy.outputs.lightstep_predeploy_md }}
-          check_for_duplicate_msg: true

.github/workflows/release.yml

@@ -20,10 +20,10 @@ jobs:
           draft: false
           prerelease: false
           generateReleaseNotes: true
-      - name: Install Ruby 2.5.8
+      - name: Install Ruby jruby-9.2.12.0
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '2.5.8'
+          ruby-version: 'jruby-9.2.12.0'
       - name: Build gem
         run: gem build *.gemspec
       - name: Publish gem

.github/workflows/testing.yml

@@ -18,7 +18,8 @@ jobs:
     strategy:
       matrix:
         ruby-version:
-          - '2.5.8'
+          # - '2.5.8'
+          - 'jruby-9.2.12.0'
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby
@@ -34,7 +35,7 @@ jobs:
     strategy:
       matrix:
         ruby-version:
-          - '2.5.8'
+          # - '2.5.8'
           - 'jruby-9.2.12.0'
     steps:
     - uses: actions/checkout@v2