update miri

Author: RalfJung

Cargo.lock

@@ -232,9 +232,9 @@ dependencies = [
 
 [[package]]
 name = "byteorder"
-version = "1.2.7"
+version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94f88df23a25417badc922ab0f5716cc1330e87f71ddd9203b3a3ccd9cedf75d"
+checksum = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
 
 [[package]]
 name = "bytes"
@@ -2065,7 +2065,7 @@ dependencies = [
  "hex",
  "log",
  "num-traits",
- "rand 0.6.1",
+ "rand 0.7.0",
  "rustc-workspace-hack",
  "rustc_version",
  "shell-escape",