move from travis-ci to gitlab-ci

.gitlab-ci.yml

@@ -0,0 +1,14 @@
+stages:
+  - build
+rust-latest:
+  stage: build
+  image: rust:latest
+  script:
+    - cargo build --verbose
+    - cargo test --verbose
+rust-nightly:
+  stage: build
+  image: rustlang/rust:nightly
+  script:
+    - cargo build --verbose
+    - cargo test --verbose

.travis.yml

@@ -1,8 +0,0 @@
-sudo: false
-
-language: rust
-
-rust:
-  - stable
-  - beta
-  - nightly