Disable clap colors for now

May be re-introduced if clap adds a `DisableColoredHelp` setting.

Relevant discussion:

- https://github.com/clap-rs/clap/pull/2845#issuecomment-945185102
- https://github.com/dbrgn/tealdeer/pull/108#issuecomment-945182471

Cargo.lock

@@ -134,14 +134,12 @@ version = "3.0.0-beta.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "feff3878564edb93745d58cf63e17b63f24142506e7a20c87a5521ed7bfb1d63"
 dependencies = [
- "atty",
  "bitflags",
  "clap_derive",
  "indexmap",
  "lazy_static",
  "os_str_bytes",
  "strsim 0.10.0",
- "termcolor",
  "textwrap",
 ]
 

Cargo.toml

@@ -19,7 +19,7 @@ path = "src/main.rs"
 ansi_term = "0.12.0"
 app_dirs = { version = "2", package = "app_dirs2" }
 atty = "0.2"
-clap = { version = "3.0.0-beta.5", features = ["std", "derive", "color", "suggestions" ], default-features = false }
+clap = { version = "3.0.0-beta.5", features = ["std", "derive", "suggestions" ], default-features = false }
 env_logger = { version = "0.9", optional = true }
 log = "0.4"
 reqwest = { version = "0.11.3", features = ["blocking", "rustls-tls", "rustls-tls-native-roots"], default-features = false }