Rename packages to snake case

I much prefer kebab case, but snake case is better here since Rust would
convert it to snake case when used as an identifier anyways and you also
can't use snake case modules without explicit module path attributes.

Cargo.lock

@@ -3,9 +3,48 @@
 version = 3
 
 [[package]]
-name = "nih-plug"
+name = "nih_plug"
 version = "0.1.0"
 
 [[package]]
-name = "nih-plug-derive"
+name = "nih_plug_derive"
 version = "0.1.0"
+dependencies = [
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7342d5883fbccae1cc37a2353b09c87c9b0f3afd73f5fb9bba687a1f733b029"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "864d3e96a899863136fc6e99f3d7cae289dafe43bf2c5ac19b70df7210c0a145"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a65b3f4ffa0092e9887669db0eae07941f023991ab58ea44da8fe8e2d511c6b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"

Cargo.toml

@@ -1,2 +1,2 @@
 [workspace]
-members = ["nih-plug", "nih-plug-derive"]
+members = ["nih_plug", "nih_plug_derive"]

nih_plug/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "nih-plug"
+name = "nih_plug"
 version = "0.1.0"
 edition = "2021"
 authors = ["Robbert van der Helm <mail@robbertvanderhelm.nl>"]

nih_plug_derive/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "nih-plug-derive"
+name = "nih_plug_derive"
 version = "0.1.0"
 edition = "2021"
 authors = ["Robbert van der Helm <mail@robbertvanderhelm.nl>"]