Add an allowOverrideWithoutParam setting for jsdoc/require-param

[rsimha]

This PR adds a new boolean setting called allowOverrideWithoutParam with a default value of false.

• When the setting is true, the @override tag can be used without any accompanying @param tag(s).
• When the setting is omitted (or explicitly set to false), the original behavior remains, and jsdoc/require-param will flag an error when it finds an @override tag without the correct accompanying @param tags.

This was required due to the recommendations of the Google JS style guide (here, here, and here). See #73 and ampproject/amphtml#15297 for more context.

Fixes #73
Fixes #20
Follow up to #24

[rsimha]

/to @gajus

[rsimha]

Travis PR check is green.

I also tested the changes in this PR with ampproject/amphtml: extensions/amp-hulu/0.1/amp-hulu.js, which is supposed to have zero JSDoc lint errors.

Before:

[19:46:52] INFO: Running lint on extensions/amp-hulu/0.1/amp-hulu.js
[19:46:53] /usr/local/google/home/rsimha/src/amphtml/extensions/amp-hulu/0.1/amp-hulu.js
  38:3  warning  Missing JSDoc @param "layout" declaration  jsdoc/require-param

✖ 1 problem (0 errors, 1 warning)

[19:46:53] WARNING: Found 0 error(s) and 1 warning(s).

After:

[19:46:37] INFO: Running lint on extensions/amp-hulu/0.1/amp-hulu.js
[19:46:38] SUCCESS: No linter warnings or errors.

This is ready for review.

[gajus]

Thank you

[rsimha]

@gajus, thanks for the quick turnaround.

I was curious about 83ff68f. Did I miss updating any files?

[gajus]

I was curious about 83ff68f. Did I miss updating any files?

The README.md document you've edited is generated using templates in:

https://github.com/gajus/eslint-plugin-jsdoc/tree/master/.README

Refer to https://github.com/gajus/gitdown for more information.