Add pattern argument

[hoshinotsuyoshi]

Added pattern argument.

Note: Unlike the arguments handled by this graphql-constraint-directive gem (maxLength, minLength, etc.), validation is not performed on the graphql-ruby side. I am determined to validate regular expressions with the model on the rails app side.

[MH4GF]

Note: Unlike the arguments handled by this graphql-constraint-directive gem (maxLength, minLength, etc.), validation is not performed on the graphql-ruby side. I am determined to validate regular expressions with the model on the rails app side.

suggestion: I thought the above information could also be added to the README. I think (unimplemented) should be removed as well.

graphql-ruby-constraint-directive/README.md

Line 83 in 9f43bc3

#### pattern(unimplemented)

[hoshinotsuyoshi]

Note: Unlike the arguments handled by this graphql-constraint-directive gem (maxLength, minLength, etc.), validation is not performed on the graphql-ruby side. I am determined to validate regular expressions with the model on the rails app side.

suggestion: I thought the above information could also be added to the README. I think (unimplemented) should be removed as well.

Updated! 6df37c2 @MH4GF

[MH4GF]

LGTM 😄