[ci] Use `ghr` CLI tool to post Win32 artifact to GitHub

.circleci/config.yml

@@ -145,6 +145,16 @@ jobs:
     steps:
       - attach_workspace:
           at: .
+      - run: |
+          if [[ -n $GITHUB_TOKEN ]]; then
+            export _GHR=ghr_v0.13.0_linux_amd64
+            curl -sL https://github.com/tcnksm/ghr/releases/download/v0.13.0/$_GHR.tar.gz | tar xz --strip-components=1 $_GHR/ghr
+            mv harfbuzz-win32{,-$CIRCLE_TAG}.zip
+            echo TOKEN IS = $GITHUB_TOKEN
+            ./ghr -replace -u $CIRCLE_PROJECT_USERNAME -r $CIRCLE_PROJECT_REPONAME $CIRCLE_TAG harfbuzz-win32-$CIRCLE_TAG.zip
+          else
+            echo "No GITHUB_TOKEN secret found, artifact publishing skipped"
+          fi
 
 workflows:
   version: 2