chore: add github workflow to verify MSRV

.github/workflows/msrv.yml

@@ -0,0 +1,23 @@
+name: Verify MSRV version
+
+on:
+  push:
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build_and_test:
+    name: Build & Test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        toolchain:
+          - stable
+
+    steps:
+      - uses: actions/checkout@v3
+      - run: rustup update ${{ matrix.toolchain }} && rustup default ${{ matrix.toolchain }}
+      - run: cargo install cargo-msrv
+      - run: cargo msrv verify