fix: correct typo in test/util.js (#1523)

Author: zaki-yama

test/scenarios/add-and-remove-repository-collaborator-test.js

@@ -1,4 +1,4 @@
-const { loadFixture, fixtureToInstace } = require("../util");
+const { loadFixture, fixtureToInstance } = require("../util");
 
 require("../mocha-node-setup");
 
@@ -9,10 +9,10 @@ describe("api.github.com", () => {
   beforeEach(() => {
     return loadFixture("add-and-remove-repository-collaborator").then(
       fixture => {
-        githubUserA = fixtureToInstace(fixture, {
+        githubUserA = fixtureToInstance(fixture, {
           auth: "token 0000000000000000000000000000000000000001"
         });
-        githubUserB = fixtureToInstace(fixture, {
+        githubUserB = fixtureToInstance(fixture, {
           auth: "token 0000000000000000000000000000000000000002"
         });
       }

test/util.js

@@ -1,6 +1,6 @@
 module.exports = {
   loadFixture,
-  fixtureToInstace,
+  fixtureToInstance,
   getInstance
 };
 
@@ -24,7 +24,7 @@ function loadFixture(scenario) {
     });
 }
 
-function fixtureToInstace({ url }, options) {
+function fixtureToInstance({ url }, options) {
   return new Octokit(
     Object.assign(options || {}, {
       baseUrl: url
@@ -34,6 +34,6 @@ function fixtureToInstace({ url }, options) {
 
 function getInstance(scenario, options) {
   return loadFixture(scenario).then(fixture =>
-    fixtureToInstace(fixture, options)
+    fixtureToInstance(fixture, options)
   );
 }