Please release 3.1.3 gem

[amatsuda]

Current newest stable 3.1.2 gem seems broken when combined with sprockets 3.x. It tries to parse non-slim file via Slim, then causes Slim::Parser::SyntaxError on my app.
It's been fixed in master via #142, so I appreciate if you could just package current master and push it as 3.1.3 gem. 🙏
I suppose some recently reported issues such as #140, #144, #145, #146, #147 could be hitting the same problem, and so you can close them all with the new gem release.

[januszm]

@amatsuda 3.1.3 released

[amatsuda]

@januszm Wow, so quick! Thank you! 🎉