Update bindgen requirement from 0.56 to 0.57 (#36)

dependabot[bot] · web-flow · commit d943d36c715d · 2021-02-12T03:48:00.000Z
diff --git a/Cargo.toml b/Cargo.toml
@@ -11,5 +11,5 @@ license = "LGPL-3.0"
 [dependencies]
 
 [build-dependencies]
-bindgen = "0.56"
+bindgen = "0.57"
 cmake = "0.1"
