Update nghttp2 requirement

Author: alexcrichton

curl-sys/Cargo.toml

@@ -21,7 +21,7 @@ path = "lib.rs"
 [dependencies]
 libz-sys = "1.0.18"
 libc = "0.2.2"
-libnghttp2-sys = { optional = true, version = "0.1" }
+libnghttp2-sys = { optional = true, version = "0.1.3" }
 
 [dependencies.mesalink]
 version = "1.1.0-cratesio"