Auto merge of #415 - ignatenkobrain:patch-1, r=BurntSushi

bump memchr to 2

Author: bors

Cargo.toml

@@ -21,7 +21,7 @@ appveyor = { repository = "rust-lang-libs/regex" }
 # For very fast prefix literal matching.
 aho-corasick = "0.6.0"
 # For skipping along search text quickly when a leading byte is known.
-memchr = "1.0.0"
+memchr = "2.0.0"
 # For managing regex caches quickly across multiple threads.
 thread_local = "0.3.2"
 # For parsing regular expressions.