remove minor version specifiers in Cargo.toml

this does not touch the libc req, but does move the libc req to a cfg gate

Cargo.toml

@@ -12,22 +12,23 @@ edition = "2018"
 
 [dependencies]
 atty = "0.2"
-color-eyre = "0.6.1"
-eyre = "0.6.7"
+color-eyre = "0.6"
+eyre = "0.6"
 home = "0.5"
-lazy_static = "1.0"
-libc = "0.2.104"
+lazy_static = "1"
 rustc_version = "0.4"
 toml = "0.5"
 which = { version = "4", default_features = false }
-shell-escape = "0.1.4"
-serde_json = "1.0.48"
+shell-escape = "0.1"
+serde_json = "1"
 
 [target.'cfg(not(windows))'.dependencies]
 nix = "0.23"
+libc = "0.2.104"
+
 
 [target.'cfg(windows)'.dependencies]
-winapi = { version = "0.3.7", features = ["winbase"] }
+winapi = { version = "0.3", features = ["winbase"] }
 
 [profile.release]
 lto = true