Bump logstash version to 7.15.2 (#4)

Author: ZhangJian He

build.gradle

@@ -46,10 +46,10 @@ shadowJar {
 }
 
 dependencies {
-    compile 'org.apache.logging.log4j:log4j-core:2.13.3'
-    compile 'org.apache.logging.log4j:log4j-api:2.13.3'
-    compile 'org.apache.pulsar:pulsar-client:2.7.1'
-    implementation files(LOGSTASH_CORE_PATH + '../logstash-core/build/libs/logstash-core-7.11.3.jar')
+    implementation 'org.apache.logging.log4j:log4j-core:2.13.3'
+    implementation 'org.apache.logging.log4j:log4j-api:2.13.3'
+    implementation 'org.apache.pulsar:pulsar-client:2.7.1'
+    implementation files(LOGSTASH_CORE_PATH + '/../logstash-core/build/libs/logstash-core-7.15.2.jar')
 
 
     testImplementation 'junit:junit:4.12'

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists