add node 15 to GitHub Actions

Author: josiasmontag

.github/workflows/run-tests.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 14.x]
+        node-version: [10.x, 12.x, 14.x, 15.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:

tests/integration/JobsResourceTest.js

@@ -101,7 +101,7 @@ describe('JobsResource', () => {
                 __dirname + '/../integration/files/input.png'
             );
 
-            await this.cloudConvert.tasks.upload(uploadTask, stream);
+            this.cloudConvert.tasks.upload(uploadTask, stream);
 
             const event = await new Promise(resolve => {
                 this.cloudConvert.jobs.subscribeEvent(