Update WorldEdit Maven Repo & use Java 11 (#43)

* Use HTTPS for sk89q maven repo

Newer Maven releases don't allow use of http endpoints. Bump this to the secure https endpoint.

* Migrate sk89q maven repo to enginehub

Both URLs point to the same place, but according to https://worldguard.enginehub.org/en/latest/developer/dependency/ enginehub is the preferred source.

* Bump Java to Adoptium Hotspot JDK 11

.github/workflows/build.yml

@@ -13,10 +13,11 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
-      - name: Set up JDK 8
-        uses: actions/setup-java@v1
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
         with:
-          java-version: 8
+          java-version: '11'
+          distribution: 'adopt-hotspot'
       - name: Cache SonarCloud packages
         uses: actions/cache@v1
         with:

pom.xml

@@ -83,8 +83,8 @@
       <url>https://repo.codemc.org/repository/maven-public/</url>
     </repository>
     <repository>
-      <id>sk89q-repo</id>
-      <url>http://maven.sk89q.com/repo/</url>
+      <id>enginehub-repo</id>
+      <url>https://maven.enginehub.org/repo/</url>
     </repository>
   </repositories>
   <dependencies>