feat(lib): increase MSRV to 1.63 (#3293)

Author: seanmonstar

Cargo.toml

@@ -11,7 +11,7 @@ authors = ["Sean McArthur <sean@seanmonstar.com>"]
 keywords = ["http", "hyper", "hyperium"]
 categories = ["network-programming", "web-programming::http-client", "web-programming::http-server"]
 edition = "2018"
-rust-version = "1.56" # keep in sync with MSRV.md dev doc
+rust-version = "1.63" # keep in sync with MSRV.md dev doc
 
 include = [
   "Cargo.toml",

docs/MSRV.md

@@ -6,4 +6,4 @@ hyper. It is possible that an older compiler can work, but that is not
 guaranteed. We try to increase the MSRV responsibly, only when a significant
 new feature is needed.
 
-The current MSRV is: **1.56**.
+The current MSRV is: **1.63**.