Remove unsupported annotation Targets.

src/main/java/com/bajuglair/dicontainer/annotation/Autowired.java

@@ -9,7 +9,7 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
 /**
  * Injectable annotation
  */
-@Target({ METHOD, CONSTRUCTOR, FIELD })
+@Target({ FIELD })
 @Retention(RUNTIME)
 @Documented
 public @interface Autowired {

src/main/java/com/bajuglair/dicontainer/annotation/Tag.java

@@ -10,7 +10,7 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
 /**
  * Specify type to inject
  */
-@Target({ METHOD, CONSTRUCTOR, FIELD })
+@Target({ FIELD })
 @Retention(RUNTIME)
 @Documented
 public @interface Tag {

src/main/java/com/bajuglair/dicontainer/annotation/Unique.java

@@ -10,7 +10,7 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
 /**
  * Unique injection required
  */
-@Target({ METHOD, CONSTRUCTOR, FIELD })
+@Target({ FIELD })
 @Retention(RUNTIME)
 @Documented
 public @interface Unique {