Merge #1828

1828: bump libc to 0.2.133 r=rtzoeller a=SteveLauC

Bump `libc` so that `setgrent/getgrent/endgrent` are available on fuchsia, and thus the CI failure in #1820 will be resolved

Co-authored-by: Steve Lau <stevelauc@outlook.com>

Cargo.toml

@@ -27,7 +27,7 @@ targets = [
 ]
 
 [dependencies]
-libc = { version = "0.2.127", features = [ "extra_traits" ] }
+libc = { version = "0.2.133", features = [ "extra_traits" ] }
 bitflags = "1.1"
 cfg-if = "1.0"
 pin-utils = { version = "0.1.0", optional = true }