Fixed maven build

Fixed #1

Author: koca2000

pom.xml

@@ -3,11 +3,17 @@
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-
+	
     <groupId>com.xxmicloxx</groupId>
     <artifactId>NoteBlockAPI</artifactId>
     <version>1.1.7</version>
-    <repositories>
+    
+	<properties>
+		<maven.compiler.source>1.8</maven.compiler.source>
+		<maven.compiler.target>1.8</maven.compiler.target>
+	</properties>
+  
+	<repositories>
         <repository>
             <id>spigot-repo</id>
             <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
@@ -44,15 +50,6 @@
     </distributionManagement>
     <build>
         <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.1</version>
-                <configuration>
-                    <source>1.7</source>
-                    <target>1.7</target>
-                </configuration>
-            </plugin>
             <plugin>
 		      <groupId>org.apache.maven.plugins</groupId>
 		      <artifactId>maven-shade-plugin</artifactId>