Update crate calculator-backend

Author: bors

ca/lc/calculator-backend

@@ -4,3 +4,4 @@
 {"name":"calculator-backend","vers":"0.1.3","deps":[{"name":"cc","req":"^1.2.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"build"},{"name":"libc","req":"^0.2","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"4e308f191457b61856819bbd4a8c3abd6298d0ba3b6ccccbc44aa66ac74758fb","features":{},"yanked":false}
 {"name":"calculator-backend","vers":"0.1.4","deps":[{"name":"cc","req":"^1.2.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"build"},{"name":"libc","req":"^0.2","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"35744bf9d5659cfc0f4bf0d8b38ac43ace5b5fa7eb2412b5175c0bd60de918f1","features":{},"yanked":false}
 {"name":"calculator-backend","vers":"0.1.5","deps":[{"name":"cc","req":"^1.2.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"build"},{"name":"libc","req":"^0.2","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"893886764d272013167b5535cf2e685118a3e614666909f12c3515a4ab229d06","features":{},"yanked":false}
+{"name":"calculator-backend","vers":"0.1.6","deps":[{"name":"cc","req":"^1.2.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"build"},{"name":"libc","req":"^0.2","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"a518e6ccc3df8e884e7b464553474f6127b481bb92f0f10d3e934145c15ce3bd","features":{},"yanked":false}