Revert "ci: Bump resolver to version 2" (#97)

This reverts commit 3789392.

Author: taiki-e

Cargo.toml

@@ -13,7 +13,6 @@ repository = "https://github.com/smol-rs/fastrand"
 keywords = ["simple", "fast", "rand", "random", "wyrand"]
 categories = ["algorithms"]
 exclude = ["/.*"]
-resolver = "2"
 
 [features]
 default = ["std"]