Initial working editComment mutation

graph/typeDefs.graphql

@@ -780,6 +780,17 @@ type StopIgnoringUserResponse implements Response {
   errors: [UserError]
 }
 
+# Input to editComment mutation
+input EditCommentInput {
+  # Update body of the comment
+  body: String!
+}
+
+type EditCommentResponse implements Response {
+  # An array of errors relating to the mutation that occured.
+  errors: [UserError]  
+}
+
 # All mutations for the application are defined on this object.
 type RootMutation {
 
@@ -798,6 +809,9 @@ type RootMutation {
   # Delete an action based on the action id.
   deleteAction(id: ID!): DeleteActionResponse
 
+  # Edit a comment
+  editComment(id: ID!, edit: EditCommentInput): EditCommentResponse
+
   # Sets User status. Requires the `ADMIN` role.
   setUserStatus(id: ID!, status: USER_STATUS!): SetUserStatusResponse