chore: bump version to 0.1.2

Sync Cargo.toml to 0.1.2 and bring PKGBUILD up to date (was stale at
0.1.0): pin the git source to the release tag for reproducible builds
and install the LICENSE file.

PKGBUILD

@@ -1,6 +1,6 @@
 # Maintainer: nevaforget <dom@moonarch.de>
 pkgname=corsairctl
-pkgver=0.1.0
+pkgver=0.1.2
 pkgrel=1
 pkgdesc='CLI tool for Corsair Bragi-protocol devices (HS80 RGB Wireless, etc.)'
 arch=('x86_64')
@@ -8,7 +8,7 @@ url='https://gitea.moonarch.de/nevaforget/corsairctl'
 license=('MIT')
 depends=('hidapi' 'alsa-lib')
 makedepends=('cargo' 'pkg-config')
-source=("git+${url}.git")
+source=("git+${url}.git#tag=v$pkgver")
 sha256sums=('SKIP')
 
 prepare() {
@@ -29,4 +29,5 @@ package() {
     install -Dm755 "target/release/$pkgname" "$pkgdir/usr/bin/$pkgname"
     install -Dm755 "scripts/corsairctl-waybar.sh" "$pkgdir/usr/bin/corsairctl-waybar"
     install -Dm644 "udev/99-corsair.rules" "$pkgdir/usr/lib/udev/rules.d/99-corsair.rules"
+    install -Dm644 "LICENSE" "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
 }