add missing bind

[WithSecureSamiTikka]

This should fix a rarely occurring error:

TypeError: Cannot call method 'soapRequest' of undefined
at /var/task/node_modules/fuelsdk-node/node_modules/fuel-soap/lib/fuel-soap.js:118:11

[vernak2539]

@FsecureSamiTikka great should be able to get this merged and released soon. If you wouldn't mind, when does this happen? As you said, it's pretty rare, but would be nice to know the cause

[vernak2539]

published as fuel-soap@1.3.1

[WithSecureSamiTikka]

Not really sure when exactly it happens. I have this code running in a lambda function and I was investigating an error that seems to happen almost exactly every 24 hours. The error was in the commit message.

[dougwilson]

Based on where the .bind was added as the only places using the context in the function, it's on an error, token failure, and similar exceptional conditions.