chore: replace wrapper task with wrapper config (#22)

* chore: remove the wrapper task to get up CircleCI

* chore: replace wrapper task with wrapper config

* test: assert correct devnet version

* test: use devnet to make the assertions for the devnet test

Author: faustbrian

build.gradle

@@ -117,6 +117,6 @@ jacocoTestReport {
     }
 }
 
-task wrapper(type: Wrapper) {
+wrapper {
     gradleVersion = '4.9'
 }

src/test/java/org/arkecosystem/crypto/networks/DevnetTest.java

@@ -1,6 +1,5 @@
 package org.arkecosystem.crypto.networks;
 
-import org.arkecosystem.crypto.configuration.Network;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -9,16 +8,16 @@ class DevnetTest {
 
     @Test
     void version() {
-        assertEquals(0x17, Network.get().version());
+        assertEquals(0x1E, new Devnet().version());
     }
 
     @Test
     void wif() {
-        assertEquals(170, Network.get().wif());
+        assertEquals(170, new Devnet().wif());
     }
 
     @Test
     void epoch() {
-        assertEquals("2017-03-21 13:00:00", Network.get().epoch());
+        assertEquals("2017-03-21 13:00:00", new Devnet().epoch());
     }
 }