Merge pull request #1840 from dhensby/fix/test-promise-reset

fix: reset sql.Promise after custom promise library test

Author: dhensby

test/common/unit.js

@@ -123,6 +123,7 @@ describe('Unit', () => {
     sql.Promise = FakePromise
     sql.close().then(() => {
       assert.strictEqual(resolved, true)
+      sql.Promise = Promise
       done()
     })
   })