Full regex mode for jsdoc_custom_args_hook (reopened)

[davidosomething]

• ADDED g:jsdoc_custom_args_regex_only config boolean
• ADDED support for matching against full regexes
• ADDED documentation

E.g. for

function myfunc(_isPrivateBoolean, isanother) {
}

the settings:

let g:jsdoc_custom_args_regex_only = 1
let g:jsdoc_custom_args_hook = {
                      \   '^_\?is': {
                      \     'type': '{Boolean}'
                      \   },
}

will yield

/**
 * @param {Boolean} _isPrivateBoolean
 * @param {Boolean} isanother
 */
function myfunc(_isPrivateBoolean, isanother) {
}

addresses #47 in a backwards compatible manner

REOPENED in separate branch from #49

[heavenshell]

@davidosomething
LGTM.
Could you squash #49 and this pull request?
Then I'll merge it.

[davidosomething]

done!

[ryanoasis]

@davidosomething Pretty sweet! Thanks!

[heavenshell]

@davidosomething
Merged.
Thanks 😄