Add circleci config

.circleci/config.yml

@@ -0,0 +1,46 @@
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/rust:latest
+    steps:
+      - checkout
+      - run:
+          name: Version information
+          command: rustc --version; cargo --version; rustup --version
+      - run:
+          name: Calculate dependencies
+          command: cargo generate-lockfile
+      - restore_cache:
+          keys:
+            - cargo-cache-{{ arch }}-{{ checksum "Cargo.lock" }}
+      - run:
+          name: Check Formatting
+          command: |
+              rustup component add rustfmt
+              rustfmt --version
+              cargo fmt --all -- --check --color=auto
+      - run:
+        name: Install Lua
+        command: |
+            sudo apt-get update
+            sudo apt-get -y --no-install-recommends install liblua5.1-0-dev libluajit-5.1-dev liblua5.3-dev
+      - run:
+          name: Build all targets
+          command: cargo build --all --all-targets
+      - run:
+          name: Run all tests / Lua 5.3
+          command: cargo test --all --no-default-features --features lua53
+      - run:
+          name: Run all tests / Lua 5.1
+          command: cargo test --all --no-default-features --features lua51
+      - run:
+          name: Run all tests / LuaJIT
+          command: cargo test --all --no-default-features --features luajit
+      - save_cache:
+          paths:
+            - /usr/local/cargo/registry
+            - target/debug/.fingerprint
+            - target/debug/build
+            - target/debug/deps
+          key: cargo-cache-{{ arch }}-{{ checksum "Cargo.lock" }}

.travis.yml

@@ -1,17 +0,0 @@
-language: rust
-env:
-  - RUSTFLAGS="-D warnings"
-before_script:
-  rustup component add rustfmt-preview
-matrix:
-  include:
-    - rust: stable
-      script:
-        - cargo fmt --all -- --check
-        - cargo test --all --verbose
-    - rust: beta
-      script: cargo test --all --verbose
-    - rust: nightly 
-      script: cargo test --all --verbose --features compiletest_rs
-  allow_failures:
-    - rust: nightly