Fix operator precedence.

[ian-r-rose]

Fixes jupyterlab/jupyterlab-google-drive#138.

Bug was introduced by yours-truly in #4757.

[blink1073]

Error is legit:

$ tsc && node build.js
../notebook-extension/src/index.ts:509:24 - error TS2345: Argument of type 'string | number | true | ReadonlyJSONObject | ReadonlyJSONArray' is not assignable to parameter of type 'string'.
  Type 'number' is not assignable to type 'string'.
509       return createNew(cwd, kernelName);
                           ~~~

[ian-r-rose]

Thanks, updated.

[blink1073]

I'll release 0.34.1 after this

[stonebig]

does it mean extensions like pyviz_comms must now point to 18.3 ?

https://github.com/pyviz/pyviz_comms/blob/master/package.json#L32.L35

[ian-r-rose]

No, they should be fine, @stonebig

[stonebig]

ok.