Remove Travis configuration

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: test
+name: CI
 
 on:
   push:

.travis.yml

@@ -1,28 +0,0 @@
-language: rust
-
-matrix:
-  include:
-    - rust: nightly
-      script:
-        - cargo test
-        - cargo build --tests --features no-panic --release
-    - rust: beta
-      script:
-        - cargo test
-    - rust: stable
-      script:
-        - cargo test
-    - rust: 1.15.0
-      script:
-        - cargo build
-        - cargo build --features small
-    - name: Miri
-      install:
-        - MIRI_NIGHTLY=nightly-$(curl -s https://rust-lang.github.io/rustup-components-history/x86_64-unknown-linux-gnu/miri)
-        - echo "Latest nightly with Miri is $MIRI_NIGHTLY"
-        - rustup set profile minimal
-        - rustup default "$MIRI_NIGHTLY"
-        - rustup component add miri
-        - cargo miri setup
-      script:
-        - cargo miri test