fix: use java 12 as JitCI doesn't manage 14

Author: FrogDevelopper

build.gradle

@@ -12,8 +12,8 @@ plugins {
 group = 'com.frog-development'
 description = 'authorization-jwt-module'
 
-sourceCompatibility = JavaVersion.VERSION_14
-targetCompatibility = JavaVersion.VERSION_14
+sourceCompatibility = JavaVersion.VERSION_12
+targetCompatibility = JavaVersion.VERSION_12
 
 repositories {
     jcenter()

jitpack.yml

@@ -1,8 +1,2 @@
 jdk:
-  - openjdk14
-
-before_install:
-  - echo "Install java 14"
-  - wget https://github.com/sormuras/bach/raw/master/install-jdk.sh
-  - source install-jdk.sh --feature 14
-  - jshell --version
+  - openjdk12