export secrets as environment variables

Author: ericchung

.github/workflows/build.yml

@@ -11,6 +11,9 @@ jobs:
       - uses: actions/setup-java@v1
         with:
           java-version: 8
+        env:
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
       - name: install
         run: mvn --settings .github/workflows/mvnsettings.xml install -DskipTests=true -Dgpg.skip -Dmaven.javadoc.skip=true -B -V
       - name: deploy