还原sourceCompatibility和targetCompatibility

Author: lianup

build.gradle

@@ -7,6 +7,9 @@ plugins {
 group 'com.github.wechatpay-apiv3'
 version '0.4.8'
 
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
+
 repositories {
     mavenCentral()
 }