add circleci

.circleci/config.yml

@@ -0,0 +1,22 @@
+version: 2
+
+jobs:
+  build:
+    docker:
+      - image: circleci/rust:latest
+    steps:
+      - checkout
+      - run:
+          name: Install Dependencies
+          command: |
+              cargo install cargo-audit
+              rustup component add clippy
+      - run: cargo test --all
+      - run:
+          name: Check style
+          command: |
+              cargo fmt --all -- --check
+              cargo clippy --all-targets --all-features -- -D warnings
+      - run:
+          name: Audit Dependencies
+          command: cargo audit