Suppress warning about calling getClass() on annotation.

moshi/src/test/java/com/squareup/moshi/TypesTest.java

@@ -209,6 +209,7 @@ public final class TypesTest {
         .containsExactly(String.class, Integer.class);
   }
 
+  @SuppressWarnings("GetClassOnAnnotation") // Explicitly checking for proxy implementation.
   @Test public void createJsonQualifierImplementation() throws Exception {
     TestQualifier actual = Types.createJsonQualifierImplementation(TestQualifier.class);
     TestQualifier expected =

pom.xml

@@ -80,7 +80,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
-          <version>3.3</version>
+          <version>3.6.1</version>
           <configuration>
             <compilerId>javac-with-errorprone</compilerId>
             <forceJavacCompilerUse>true</forceJavacCompilerUse>
@@ -91,12 +91,12 @@
             <dependency>
               <groupId>org.codehaus.plexus</groupId>
               <artifactId>plexus-compiler-javac-errorprone</artifactId>
-              <version>2.8</version>
+              <version>2.8.1</version>
             </dependency>
             <dependency>
               <groupId>com.google.errorprone</groupId>
               <artifactId>error_prone_core</artifactId>
-              <version>2.0.15</version>
+              <version>2.0.16</version>
             </dependency>
           </dependencies>
         </plugin>