Upgrade lazysodium and jni, drop jcenter

This commit removes the dependency on the JCenter repository, which was
discontinued and is now in read-only mode.

Author: threema-danilo

build.gradle

@@ -30,7 +30,6 @@ ext {
 // In this section you declare where to find the dependencies of your project
 repositories {
     mavenCentral()
-    jcenter() // TODO: Remove
 }
 
 // In this section you declare the dependencies for your production and test code
@@ -57,8 +56,8 @@ dependencies {
     // Test dependencies
     testImplementation 'org.slf4j:slf4j-simple:[1.7,1.8)'
     testImplementation 'junit:junit:4.12'
-    testImplementation 'com.goterl.lazycode:lazysodium-java:[3.3,4)'
-    testImplementation 'net.java.dev.jna:jna:[5,6)'
+    testImplementation 'com.goterl:lazysodium-java:5.0.1'
+    testImplementation 'net.java.dev.jna:jna:5.8.0'
 }
 
 test {

src/test/java/org/saltyrtc/client/tests/LazysodiumCryptoInstance.java

@@ -7,16 +7,16 @@
  */
 package org.saltyrtc.client.tests;
 
-import com.goterl.lazycode.lazysodium.LazySodiumJava;
-import com.goterl.lazycode.lazysodium.SodiumJava;
-import com.goterl.lazycode.lazysodium.interfaces.Box;
+import com.goterl.lazysodium.LazySodiumJava;
+import com.goterl.lazysodium.SodiumJava;
+import com.goterl.lazysodium.interfaces.Box;
 import org.saltyrtc.client.annotations.NonNull;
 import org.saltyrtc.client.crypto.CryptoException;
 import org.saltyrtc.client.crypto.CryptoInstance;
 import org.saltyrtc.client.crypto.CryptoProvider;
 
-import static com.goterl.lazycode.lazysodium.interfaces.Box.BEFORENMBYTES;
-import static com.goterl.lazycode.lazysodium.interfaces.Box.MACBYTES;
+import static com.goterl.lazysodium.interfaces.Box.BEFORENMBYTES;
+import static com.goterl.lazysodium.interfaces.Box.MACBYTES;
 
 /**
  * An implementation of the CryptoInstance interface for lazysodium-java.

src/test/java/org/saltyrtc/client/tests/LazysodiumCryptoProvider.java

@@ -7,10 +7,10 @@
  */
 package org.saltyrtc.client.tests;
 
-import com.goterl.lazycode.lazysodium.LazySodiumJava;
-import com.goterl.lazycode.lazysodium.SodiumJava;
-import com.goterl.lazycode.lazysodium.interfaces.Box;
-import com.goterl.lazycode.lazysodium.interfaces.SecretBox;
+import com.goterl.lazysodium.LazySodiumJava;
+import com.goterl.lazysodium.SodiumJava;
+import com.goterl.lazysodium.interfaces.Box;
+import com.goterl.lazysodium.interfaces.SecretBox;
 import org.saltyrtc.client.annotations.NonNull;
 import org.saltyrtc.client.crypto.CryptoException;
 import org.saltyrtc.client.crypto.CryptoInstance;