Don't run clean builds on CI (#91)

to take advantage of the Gradle cache

Author: drewhamilton

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Gradle cache
         uses: gradle/gradle-build-action@v2
       - name: Build
-        run: ./gradlew clean build -PciApiLevel=${{ matrix.api-level }} --stacktrace
+        run: ./gradlew build -PciApiLevel=${{ matrix.api-level }} --stacktrace
       - name: Report Detekt results
         uses: github/codeql-action/upload-sarif@v2
         with: