Add METHOD to the @GraphQLIgnore annotation target

[anotender]

Fixes #153 by adding METHOD to annotation target, so given @GraphQLIgnore annotation

@Target( { TYPE, FIELD, METHOD })
@Retention(RUNTIME)
public @interface GraphQLIgnore {
}

can be applied on getter methods in entity class to exclude these properties from schema mapping, i.e.:

@Data
@Entity
@EqualsAndHashCode(exclude="author")
public class Book {
    @Id
    Long id;

    String title;

    @ManyToOne(fetch=FetchType.LAZY, optional = false)
    Author author;

    @Transient
    @GraphQLIgnore
    public String getAuthorName(){
    	return author.getName();
    }
}

[codecov]

Codecov Report

Merging #165 into master will increase coverage by 0.01%.
The diff coverage is 84.78%.

@@             Coverage Diff              @@
##             master     #165      +/-   ##
============================================
+ Coverage     68.11%   68.12%   +0.01%     
- Complexity      498      503       +5     
============================================
  Files            33       33              
  Lines          2578     2576       -2     
  Branches        431      431              
============================================
- Hits           1756     1755       -1     
  Misses          644      644              
+ Partials        178      177       -1

Impacted Files	Coverage Δ	Complexity Δ
...ures/graphql/jpa/query/schema/model/book/Book.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...phql/jpa/query/schema/impl/IntrospectionUtils.java	84.37% <87.09%> (-0.48%)	7 <7> (+2)
...jpa/query/schema/impl/GraphQLJpaSchemaBuilder.java	89.04% <92.3%> (+0.28%)	126 <8> (+3)	⬆️

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[igdianov]

@anotender Thanks for the PR. It would be nice to have a test case for this

[anotender]

@igdianov I've just added additional test cases and a couple of code changes required to work correctly. Please have a look if it looks ok ;)

[igdianov]

@anotender Thanks! I am traveling at the moment. I will review everything over the weekend.

[igdianov]

@anotender LGTM Thank you very much for contribution.