Type mismatch errors internal to graphql-upload
I have followed the advice elsewhere about importing correctly from `graphql-upload` and using the recommended settings in `tsconfig.json`, but I'm still getting type errors that seem to be internal to `graphql-upload` and its dependencies:

```
> tsc

node_modules/graphql-upload/processRequest.js:272:47 - error TS2345: Argument of type 'FileUploadCreateReadStreamOptions' is not assignable to parameter of type 'string'.

272             return capacitor.createReadStream(options);
                                                  ~~~~~~~

node_modules/graphql-upload/processRequest.js:332:35 - error TS2339: Property 'release' does not exist on type 'WriteStream'.

332             upload.file.capacitor.release();
                                      ~~~~~~~


Found 2 errors in the same file, starting at: node_modules/graphql-upload/processRequest.js:272
```
