Bump version to 0.4.0

The proc macro helper crate also now "opts out" of semantic versioning
and the main crate has an exact requirement on it. I used this scheme
in other projects like `bunt` already. No one is supposed to use the
proc macro crate directly anyway. It's an implementation detail. And
the exact `=` requirement means that always one specific proc macro
crate version is used.

Cargo.toml

@@ -1,12 +1,12 @@
 [package]
 name = "atomig"
-version = "0.3.3"
+version = "0.4.0"
 authors = ["Lukas Kalbertodt <lukas.kalbertodt@gmail.com>"]
 edition = "2021"
 
 description = """
-Generic and convenient `std` atomics via `Atomic<T>`. Can be used with many
-primitive types (including floats) and with custom types.
+Generic, convenient and lock-free `std` atomics via `Atomic<T>`. Can be used
+with many primitive types (including floats) and with custom types.
 """
 documentation = "https://docs.rs/atomig/"
 repository = "https://github.com/LukasKalbertodt/atomig/"
@@ -21,7 +21,7 @@ categories = ["concurrency", "hardware-support", "no-std"]
 derive = ["atomig-macro"]
 
 [dependencies]
-atomig-macro = { version = "0.2.0", path = "atomig-macro", optional = true }
+atomig-macro = { version = "=0.3.0", path = "atomig-macro", optional = true }
 serde = { version = "1", default-features = false, optional = true }
 
 [dev-dependencies]

atomig-macro/Cargo.toml

@@ -1,11 +1,12 @@
 [package]
 name = "atomig-macro"
-version = "0.2.0"
+version = "0.3.0"
 authors = ["Lukas Kalbertodt <lukas.kalbertodt@gmail.com>"]
 edition = "2021"
 
 description = """
-Defines procedural macros for the crate `atomig`. Please see the main crate.
+Helper crate for `atomig`. Do not use directly, but only through main crate.
+This helper does not follow semantic versioning!
 """
 repository = "https://github.com/LukasKalbertodt/atomig/"
 license = "MIT/Apache-2.0"