blast_repo fixes (dart-lang/lints#120)

auto-publish
diff --git a/pkgs/lints/.github/workflows/publish.yaml b/pkgs/lints/.github/workflows/publish.yaml
new file mode 100644
index 0000000..e8e5a36
--- /dev/null
+++ b/pkgs/lints/.github/workflows/publish.yaml
@@ -0,0 +1,14 @@
+# A CI configuration to auto-publish pub packages.
+
+name: Publish
+
+on:
+  pull_request:
+    branches: [ main ]
+  push:
+    tags: [ 'v[0-9]+.[0-9]+.[0-9]+' ]
+
+jobs:
+  publish:
+    if: ${{ github.repository_owner == 'dart-lang' }}
+    uses: dart-lang/ecosystem/.github/workflows/publish.yaml@main