use stable not nightly (#11)

Author: jimexist

.github/workflows/build.yml

@@ -56,7 +56,7 @@ jobs:
 
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly-2021-10-23
+          toolchain: stable
 
       - name: Install dependencies
         run: |

.github/workflows/test.yaml

@@ -32,8 +32,8 @@ jobs:
 
       - name: Setup Rust toolchain
         run: |
-          rustup toolchain install nightly-2021-10-23
-          rustup default nightly-2021-10-23
+          rustup toolchain install stable
+          rustup default stable
           rustup component add rustfmt
 
       - name: Cache Cargo