bump version to 0.3.1

CHANGELOG.md

@@ -2,6 +2,8 @@
 Game store page: https://crispypin.itch.io/marble-machinations
 
 ## [unreleased]
+
+## v0.3.1 - 2025-04-05
 ### fixed
 - broken area calculation causing crash when completing a level with a machine wider than it is tall
 

Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "aho-corasick"
@@ -213,7 +213,7 @@ checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
 
 [[package]]
 name = "marble-machinations"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "arboard",
  "raylib",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "marble-machinations"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2021"
 default-run = "marble-machinations"