Increment cargo version in Github actions to MSRV.

.github/workflows/Simple.yml

@@ -4,13 +4,30 @@ on:
   [push, pull_request, workflow_dispatch]
 
 jobs:
+  build:
+    name: Rust ${{matrix.rust}}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        rust: [1.63.0]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{matrix.rust}}
+      - run: cargo check
+      - run: cargo build
+
   test:
     name: Rust ${{matrix.rust}}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        rust: [1.51.0, stable, beta, nightly]
+        rust: [1.65.0, stable, beta, nightly]
     steps:
       - uses: actions/checkout@v2
         with: