Add javax.annotations to the API

Used this set specifically because they are present in NMS already.

Spigot-API-Patches/POM-changes.patch

@@ -73,6 +73,20 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      <dependencies>
          <dependency>
              <groupId>commons-lang</groupId>
+@@ -0,0 +0,0 @@
+             <type>jar</type>
+             <scope>compile</scope>
+         </dependency>
++        <!-- bundled with Minecraft, shouldn't ever change -->
++        <dependency>
++            <groupId>javax.annotation</groupId>
++            <artifactId>javax-annotations</artifactId>
++            <version>1.0.0</version>
++            <scope>compile</scope>
++        </dependency>
+         <!-- bundled with Minecraft, should be kept in sync -->
+         <dependency>
+             <groupId>com.google.guava</groupId>
 @@ -0,0 +0,0 @@
      </dependencies>