Fix publishing prerelease tags

Author: cknitt

.github/workflows/publish.yml

@@ -60,8 +60,8 @@ jobs:
         PACKAGE_NAME=$(node -p "require('./package.json').name")
         BASE_VERSION=$(node -p "require('./package.json').version")
 
-        if [[ ! "$GITHUB_REF_NAME" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-          echo "::error::Release tags must match vX.X.X, got $GITHUB_REF_NAME."
+        if [[ ! "$GITHUB_REF_NAME" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$ ]]; then
+          echo "::error::Release tags must match vX.X.X or vX.X.X-prerelease, got $GITHUB_REF_NAME."
           exit 1
         fi