fix stuff and add editIssue mutation.

graph/schema/issue.gql

@@ -64,4 +64,20 @@ input IssueCreateInput {
     dueTime: Time
     "Optional title to use instead of the name when not in a list."
     title: String
+}
+
+input IssueEditInput {
+    "The issue to edit."
+    issueId: String!
+
+    "Set the user this issue is assigned to."
+    setAssignee: String
+    "Set the status name for the issue."
+    setStatusName: String
+    "Rename the issue."
+    setName: String
+    "Set the issue title."
+    setTitle: String
+    "Change the due time."
+    setDueTime: Time
 }

graph/schema/mutation.gql

@@ -18,6 +18,8 @@ type Mutation {
     # ISSUE
     "Create a new issue."
     createIssue(input: IssueCreateInput!): Issue!
+    "Edit an issue."
+    editIssue(input: IssueEditInput!): Issue!
     # ISSUE TASK
     "Create a new issue task."
     createIssueTask(input: IssueTaskCreateInput!): IssueTask!