Reduce version to 0.18.0. No 0.18.x was released yet, and straight up matching upstream sounds unreasonable.

Author: ViliusSutkus89

pdf2htmlEX/build.gradle

@@ -19,7 +19,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-version = '0.18.7'
+version = '0.18.0'
 group = 'com.viliussutkus89'
 
 apply plugin: 'com.android.library'
@@ -33,7 +33,7 @@ android {
         minSdkVersion 16
         targetSdkVersion 29
 
-        versionCode 10
+        versionCode 11
         versionName project.version
 
         archivesBaseName = rootProject.name