@uppy/transloadit: fix tests on v16.x

packages/@uppy/transloadit/src/index.js

@@ -699,7 +699,7 @@ module.exports = class Transloadit extends BasePlugin {
     const state = this.getPluginState()
     const assemblyIDs = state.uploadsAssemblies[uploadID]
 
-    assemblyIDs.forEach((assemblyID) => {
+    assemblyIDs?.forEach((assemblyID) => {
       if (this.activeAssemblies[assemblyID]) {
         this.activeAssemblies[assemblyID].close()
       }

packages/@uppy/transloadit/src/index.test.js

@@ -48,7 +48,7 @@ describe('Transloadit', () => {
 
     return uppy.upload().then(() => {
       throw new Error('Should not have succeeded')
-    }, (err) => {
+    }).catch((err) => {
       const fileID = Object.keys(uppy.getState().files)[0]
 
       expect(err.message).toBe('Failure!')