Update tree-sitter requirement from 0.19 to 0.20 in /ruby/extractor

.github/workflows/post-comment.yml

@@ -0,0 +1,26 @@
+name: Post comment
+on:
+  workflow_run:
+    workflows: ["Query help preview"]
+    types:
+      - completed
+
+permissions:
+  pull-requests: write
+
+jobs:
+  post_comment:
+    runs-on: ubuntu-latest
+    needs: qhelp
+    steps:
+      - name: Download artifact
+        uses: dawidd6/action-download-artifact@af92a8455a59214b7b932932f2662fdefbd78126
+        with:
+          workflow: ${{ github.event.workflow_run.workflow_id }}
+          workflow_conclusion: success
+          name: comment
+      - run: |
+          PR=$(grep -o '^[0-9]\+$' pr.txt)
+          cat comment.txt | gh pr comment "${PR}" --repo "${{ github.repository }}" -F -
+        env:
+          GITHUB_TOKEN: ${{ github.token }}

ruby/extractor/Cargo.toml

@@ -9,7 +9,7 @@ edition = "2018"
 [dependencies]
 flate2 = "1.0"
 node-types = { path = "../node-types" }
-tree-sitter = "0.19"
+tree-sitter = "0.20"
 tree-sitter-embedded-template = "0.19"
 tree-sitter-ruby = { git = "https://github.com/tree-sitter/tree-sitter-ruby.git", rev = "bb6a42e42b048627a74a127d3e0184c1eef01de9" }
 clap = "2.33"