Insufficient plural matching

[FlowMo7]

This is a cross-posted issue from diamirio/gradle-localize-plugin#1 (by @stefangeyer), which is also valid for this fastlane plugin.

Detailed description in the original issue, TL;DR:
When defining a plural without the one option, it is not interpreted as a plural.
Example (which wrongly will not be detected as a plural):

zero|No items available
other|Available items: %d

As mentioned in the original issue, the following line seems to be the problem:
https://github.com/tailoredmedia/fastlane-plugin-localize/blob/12d15603bcc42f87ff7e1fd74bb662591b9530f5/lib/fastlane/plugin/google_sheet_localize/actions/google_sheet_localize_action.rb#L414

That check would need to be expanded to match all possible keywords.

[mariohahn]

PR sind gerne gesehen (: