add categories and keywords

Cargo.toml

@@ -5,6 +5,8 @@ edition = "2021"
 description = "macro for creating configurations using miniconf"
 license = "MIT OR Apache-2.0"
 repository = "https://git.mkaenner.de/max/macroconf.git"
+categories = ["config", "embedded", "data-structures"]
+keywords = ["miniconf", "macro", "config"]
 
 [lints.rust]
 unsafe_code = "forbid"
@@ -13,8 +15,6 @@ unsafe_code = "forbid"
 enum_glob_use = "deny"
 pedantic = "deny"
 nursery = "deny"
-unwrap_used = "deny"
-expect_used = "deny"
 cargo = "warn"
 
 [lib]