Fix encoding issues with intellij (#1022)

Forces java encoding to UTF-8.

Author: SquidXTV

build.gradle

@@ -86,4 +86,12 @@ subprojects {
     test {
         useJUnitPlatform()
     }
+
+    compileJava {
+        options.encoding = "UTF-8"
+    }
+
+    compileTestJava {
+        options.encoding = "UTF-8"
+    }
 }