Use JDK 16 on the 1.17 module while using JDK 8 on everything else

.github/workflows/maven.yml

@@ -16,9 +16,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up JDK 1.8
+    - name: Set up JDK 11
       uses: actions/setup-java@v1
       with:
-        java-version: 1.8
+        java-version: 11
     - name: Build with Maven
       run: mvn -B package --file pom.xml

Core/pom.xml

@@ -23,8 +23,10 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.0</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+
+                    <release>${java.release}</release>
                 </configuration>
             </plugin>
             <plugin>

NMS/NMS-v1_17_R1/pom.xml

@@ -7,6 +7,13 @@
         <relativePath>../../</relativePath>
     </parent>
 
+    <properties>
+        <java.version>1.16</java.version>
+        <java.release>16</java.release>
+
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
     <artifactId>SongodaCore-NMS-v1_17_R1</artifactId>
 
     <modelVersion>4.0.0</modelVersion>

NMS/NMS-v1_17_R1/src/com/songoda/core/nms/v1_17_R1/anvil/AnvilView.java

@@ -2,7 +2,6 @@ package com.songoda.core.nms.v1_17_R1.anvil;
 
 import com.songoda.core.nms.anvil.CustomAnvil;
 import com.songoda.core.nms.anvil.methods.AnvilTextChange;
-import jdk.internal.misc.Unsafe;
 import net.minecraft.core.BlockPosition;
 import net.minecraft.network.chat.ChatMessage;
 import net.minecraft.network.protocol.game.PacketPlayOutOpenWindow;

pom.xml

@@ -6,6 +6,13 @@
     <modelVersion>4.0.0</modelVersion>
     <packaging>pom</packaging>
 
+    <properties>
+        <java.version>1.8</java.version>
+        <java.release>8</java.release>
+
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
     <modules>
         <module>Core</module>
         <module>Compatibility</module>
@@ -38,8 +45,10 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.0</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+
+                    <release>${java.release}</release>
                 </configuration>
             </plugin>
         </plugins>