Fix gradle build file

pgpainless-sop/build.gradle

@@ -1,9 +1,7 @@
 plugins {
-    id 'com.github.johnrengelman.shadow' version '1.2.2'
+    id 'application'
 }
 
-apply plugin: 'com.github.johnrengelman.shadow'
-
 dependencies {
     implementation(project(":pgpainless-core"))
 
@@ -17,7 +15,7 @@ dependencies {
     /*/
     implementation "org.bouncycastle:bcprov-jdk15on:$bouncyCastleVersion"
     //*/
-    api "org.bouncycastle:bcpg-jdk15on:$bouncyCastleVersion"
+    implementation "org.bouncycastle:bcpg-jdk15on:$bouncyCastleVersion"
 
     // https://mvnrepository.com/artifact/com.google.code.findbugs/jsr305
     implementation group: 'com.google.code.findbugs', name: 'jsr305', version: '3.0.2'
@@ -25,6 +23,17 @@ dependencies {
 
 mainClassName = 'org.pgpainless.sop.PGPainlessCLI'
 
-shadowJar {
-    baseName = 'pgpcli'
+jar {
+    manifest {
+        attributes 'Main-Class': "$mainClassName"
+    }
+
+    from {
+        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
+    } {
+        exclude "META-INF/*.SF"
+        exclude "META-INF/*.DSA"
+        exclude "META-INF/*.RSA"
+    }
 }
+