Switch to using NIH-log for the logger

This greatly simplifies the setup, provides more deterministic and
performant behavior, and allows for better WinDbg integration by
detecting its presence at runtime and by using the regular pretty log
format there as well.

Cargo.toml

@@ -85,11 +85,11 @@ crossbeam = "0.8"
 lazy_static = "1.4"
 log = { version = "0.4", features = ["std", "release_max_level_info"] }
 midi-consts = "0.1"
+nih_log = "0.1.0"
 parking_lot = "0.12"
 raw-window-handle = "0.4"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-simplelog = "0.12"
 widestring = "1.0.0-beta.1"
 
 # Used for the `assert_process_allocs` feature. This fork includes support for
@@ -130,11 +130,6 @@ libc = "0.2.124"
 objc = "0.2.7"
 core-foundation = "0.9.3"
 
-[target.'cfg(target_os = "windows")'.dependencies]
-# STDIO isn't reliable on Windows, so when hosting plugins in a DAW it may be
-# useful to log using `OutputDebugString()` instead
-win_dbg_logger = "0.1"
-
 [target.'cfg(target_os = "windows")'.dependencies.windows]
 version = "0.32"
 features = [