Update JavacCompilerTest.java to not allow annotation on classes

Usage of the annotation on classes is undocumented and not actively supported.

Signed-off-by: ascopes <[email protected]>

Author: ascopes

java-compiler-testing/src/main/java/io/github/ascopes/jct/junit/JavacCompilerTest.java

@@ -80,12 +80,15 @@
 @Documented
 @ParameterizedTest(name = "for compiler \"{0}\"")
 @Retention(RetentionPolicy.RUNTIME)
-@Target({ElementType.ANNOTATION_TYPE, ElementType.METHOD, ElementType.TYPE})
-@TestTemplate
 @Tags({
     @Tag("java-compiler-testing-test"),
     @Tag("javac-test")
 })
+@Target({
+    ElementType.ANNOTATION_TYPE, 
+    ElementType.METHOD,
+})
+@TestTemplate
 public @interface JavacCompilerTest {
 
   /**