Add github action for updating the lockfiles

.github/scripts/update-lockfiles.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+function update_lockfiles() {
+    for toml in **/Cargo.toml; do 
+        (cd "$(dirname "$toml")" && cargo generate-lockfile)
+    done
+}
+
+update_lockfiles
+update_lockfiles
+update_lockfiles
+update_lockfiles
+
+git -c user.name="GBA bot" -c user.email="gw@ilym.me" commit -a -m 'Update lockfiles'
+git push

.github/workflows/update-lockfiles.yml

@@ -0,0 +1,19 @@
+name: Update lockfiles
+
+on:
+  push:
+    branches: [ 'renovate/*' ]
+  pull_request:
+    branches: [ 'renovate/*' ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    steps:
+    - name: Set CARGO_TARGET_DIR
+      run: echo "CARGO_TARGET_DIR=$HOME/target" >> $GITHUB_ENV
+    - name: Update lock files
+      run: bash .github/scripts/update-lockfiles.sh