Allow empty output on formatting plurals

[eazyliving]

Hiho!

Formatting with plurals is a great tool 👍
But at the moment it's not possible to leave an empty output.

Example:
'hours' => '{ 0, plural, zero {}, one {1 Stunde}, other {# Stunden} }'

Output for {{@hours,0 | format}} is:
}, one {1 Stunde

Changing line 974 in base.php from
'(?:\s*\{\s*(?<data>.+?)\s*\})/',
to
'(?:\s*\{\s*(?<data>.*?)\s*\})/',

fixes my problem, but I'm not sure, if this introduces other problems in other places and code :)

Maybe you'd like to look into that. Thanks!