Revert version bump for publishing util

buildSrc/src/main/kotlin/Dependencies.kt

@@ -27,7 +27,7 @@ object Dependencies {
     const val multidex = "androidx.multidex:multidex:2.0.1"
     const val androidGradlePlugin = "com.android.tools.build:gradle:7.2.2"
     const val kotlinGradlePlugin = "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.31"
-    const val publishGradlePlugin = "com.vanniktech:gradle-maven-publish-plugin:0.21.0"
+    const val publishGradlePlugin = "com.vanniktech:gradle-maven-publish-plugin:0.18.0"
     const val okHttpBom = "com.squareup.okhttp3:okhttp-bom:4.10.0"
     const val okHttp = "com.squareup.okhttp3:okhttp"
 }