update to JDK 16

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-java@v1
         with:
-          java-version: 14
+          java-version: 16
       - uses: actions/cache@v1
         with:
           path: ~/.m2/repository

.idea/misc.xml

@@ -8,7 +8,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_14" default="false" project-jdk-name="14" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_16" project-jdk-name="16" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

main/pom.xml

@@ -22,7 +22,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<project.jdk.version>14</project.jdk.version>
+		<project.jdk.version>16</project.jdk.version>
 
 		<!-- cryptomator dependencies -->
 		<cryptomator.cryptofs.version>1.9.14</cryptomator.cryptofs.version>