Add warning for 2nd argument in JX.Stratcom.invoke
Add warning for 2nd argument in JX.Stratcom.invoke

Summary:
This adds a ##__DEV__## check for an invalid 2nd argument to ##JX.Stratcom.invoke##. This helps catch a common error that is forgetting the second argument to ##JX.Stratcom.invoke## is the path (and not the data).

Reviewers: epriestley, cpojer, jg, aran, mroch

Test Plan:

  JX.Stratcom.invoke('event'); // No error.
  JX.Stratcom.invoke('event', null); // No error.
  JX.Stratcom.invoke('event', ['some-sigil'], { key: 'value' }); // No error.
  JX.Stratcom.invoke('event', { key: 'value' }); // Error!

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