Fix some broken unit tests.
In typing and autoOperatorNames tests, the global MQ.config was being overwritten instead of the local mq.config. This caused breakage down the line in other tests that needed to use operators.
diff --git a/test/unit/autoOperatorNames.test.js b/test/unit/autoOperatorNames.test.js
index 0199ce8..96449d4 100644
--- a/test/unit/autoOperatorNames.test.js
+++ b/test/unit/autoOperatorNames.test.js
@@ -76,7 +76,7 @@
 
   suite('override autoOperatorNames', function() {
     test('basic', function() {
-      MQ.config({ autoOperatorNames: 'sin lol' });
+      mq.config({ autoOperatorNames: 'sin lol' });
       mq.typedText('arcsintrololol');
       assert.equal(mq.latex(), 'arc\\sin tro\\operatorname{lol}ol');
     });
diff --git a/test/unit/typing.test.js b/test/unit/typing.test.js
index f3c30fe..c2f8462 100644
--- a/test/unit/typing.test.js
+++ b/test/unit/typing.test.js
@@ -813,7 +813,7 @@
 
   suite('autoCommands', function() {
     setup(function() {
-      MQ.config({
+      mq.config({
         autoOperatorNames: 'sin pp',
         autoCommands: 'pi tau phi theta Gamma sum prod sqrt nthroot'
       });