feat(resolver.js)Support handleConnection for root query

[hank-cp]

Support connection on root Query

type Query {
  users(
    first: Int
    after: String
    last: Int
    before: String
  ): UserConnection
}

or

    var userConnection = connectionDefinitions({name: 'User', nodeType: userType});

    schema = new GraphQLSchema({
      query: new GraphQLObjectType({
        name: 'RootQueryType',
        fields: {
          user: {
            type: userConnection.connectionType,
            args: connectionArgs,
            resolve: resolver(User)
          },
          node: nodeField
        }
      })
    })

Unit test included :)

[codecov-io]

Codecov Report

Merging #632 into master will increase coverage by 0.47%. The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #632      +/-   ##
=========================================
+ Coverage   91.33%   91.8%   +0.47%     
=========================================
  Files          13      13              
  Lines         427     415      -12     
=========================================
- Hits          390     381       -9     
+ Misses         37      34       -3

Impacted Files	Coverage Δ
src/resolver.js	100% <100%> (+1.78%)	:arrow_up:
src/typeMapper.js	97.29% <0%> (ø)	:arrow_up:
src/relay.js	97.1% <0%> (+1.15%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 5774259...39031c5. Read the comment docs.

[hank-cp]

Done, 1 more char triggers eslint warning...huuuu

[hank-cp]

This build failed looks not caused by my changes

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.