Update crate xmake

Author: bors

xm/ak/xmake

@@ -4,3 +4,4 @@
 {"name":"xmake","vers":"0.2.2","deps":[{"name":"cc","req":"^1.0.72","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"3eac3afa975cba2e89a94ba393479c49bf6dd95cb829a30cfe630b16588cf40f","features":{},"yanked":false}
 {"name":"xmake","vers":"0.2.3","deps":[{"name":"cc","req":"^1.0.72","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"aa49c70686019ce16c181e3b3cda470ac86ac3db20c1d6c45e0815f5276b1bf5","features":{},"yanked":false}
 {"name":"xmake","vers":"0.3.0","deps":[{"name":"cc","req":"^1.0.72","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"e808315d27de6df02653bae72fac849a54c1a72c91b6a77a7331597371d76450","features":{},"yanked":false}
+{"name":"xmake","vers":"0.3.1","deps":[{"name":"cc","req":"^1.0.72","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"76f10d77d4e2d37e10a2d8651f594f187823fac342d80c5ee36119d4d5d3ff29","features":{},"yanked":false}