Cargo.toml, Cargo.lock: change dependencies used for logging

- replace log crate with tracing,
- replace simple-log crate with tracing-subscriber and tracing-appender
- add nu-ansi-term crate as a dependency which is itself tracing-subscriber's dependency,
  inorder to write colored outputs to the terminal since we override formatting provided
  by tracing-subscriber

example/dchat/dchatd/Cargo.toml

@@ -19,7 +19,8 @@ darkfi-serial = "0.5.0"
 easy-parallel = "3.3.1"
 signal-hook-async-std = "0.3.0"
 signal-hook = "0.3.18"
-simplelog = "0.12.2"
+tracing-subscriber = { version = "0.3.19", default-features = false, features = ["fmt"] }
+tracing-appender = "0.2.3"
 smol = "2.0.2"
 
 # arg parsing
@@ -29,7 +30,7 @@ structopt-toml = "0.5.1"
 
 # misc
 async-trait = "0.1.88"
-log = "0.4.27"
+tracing = "0.1.41"
 url = "2.5.4"
 # ANCHOR_END: dependencies