Update crate dawn-sys

Author: bors

da/wn/dawn-sys

@@ -5,3 +5,4 @@
 {"name":"dawn-sys","vers":"0.3.0","deps":[],"cksum":"8fa14b09b3824ae6e7d7ed1bc076cf4287b339440b6ad5b38e16027863f47455","features":{},"yanked":false}
 {"name":"dawn-sys","vers":"0.4.0","deps":[],"cksum":"de38606956c0b416bc1392e131c4b1d926ec0ac17a847ebdeb65b5893af79708","features":{},"yanked":false}
 {"name":"dawn-sys","vers":"0.4.1","deps":[],"cksum":"f56c95f8ce4a92672314280a6e33903667372562feda0a43cda6ef52225f3a43","features":{"std":[]},"yanked":false}
+{"name":"dawn-sys","vers":"0.4.2","deps":[],"cksum":"5dcfd185acd3d9e47c8f588929b0f7186c0e9dfd053e32a0a30f0fadbdcd3730","features":{"std":[]},"yanked":false}