Update build tools

build.gradle

@@ -1,6 +1,6 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.android_plugin_version = '4.1.1'
+    ext.android_plugin_version = '4.2.1'
     ext.kotlin_version = '1.4.31'
     ext.kotlinx_version = '1.4.1'
     repositories {

buildsystem/compile.sh

@@ -260,7 +260,7 @@ fi
 
 if [ ! -d "gradle/wrapper" ]; then
     diagnostic "Downloading gradle"
-    GRADLE_VERSION=6.6
+    GRADLE_VERSION=6.7.1
     GRADLE_URL=https://download.videolan.org/pub/contrib/gradle/gradle-${GRADLE_VERSION}-bin.zip
     wget ${GRADLE_URL} 2>/dev/null || curl -O ${GRADLE_URL} || fail "gradle: download failed"
 

buildsystem/gitlab/.gitlab-ci.yml

@@ -5,6 +5,7 @@ cache:
         - gradle-6.1.1/
         - gradle-6.5/
         - gradle-6.6/
+        - gradle-6.7.1/
         - gradle/
         - gradlew