Travis CI removed (#175).

.travis.yml

-language: minimal
-
-dist: focal
-
-services:
-  - docker
-
-env:
-  global:
-    - DOCKER_IMG="registry.gitlab.com/offa/docker-images"
-
-
-jobs:
-    include:
-    - env: COMPILER=gcc-10
-    - env: COMPILER=gcc-9
-    - env: COMPILER=gcc-8
-    - env: COMPILER=gcc-7
-    - env: COMPILER=clang-11
-    - env: COMPILER=clang-10
-    - env: COMPILER=clang-9
-    - env: COMPILER=clang-8
-    - env: COMPILER=clang-7
-    - env: CONAN_GCC_VERSIONS=9
-
-
-before_install:
-  - if [[ -v COMPILER ]]; then docker pull ${DOCKER_IMG}/${COMPILER}:stable; fi
-
-script:
-  - if [[ -v COMPILER ]]; then docker run -v ${PWD}:/mnt -it ${DOCKER_IMG}/${COMPILER} /bin/bash -c "cd /mnt; script/ci_build.sh"; fi
-  - if [[ -v CONAN_GCC_VERSIONS ]]; then script/conan_build.sh; fi

README.md

 # Scope Guard
 
 [![CI](https://github.com/offa/scope-guard/workflows/ci/badge.svg)](https://github.com/offa/scope-guard/actions)
-[![Build Status](https://travis-ci.org/offa/scope-guard.svg?branch=master)](https://travis-ci.org/offa/scope-guard)
 [![GitHub release](https://img.shields.io/github/release/offa/scope-guard.svg)](https://github.com/offa/scope-guard/releases)
 [![License](https://img.shields.io/badge/license-MIT-yellow.svg)](LICENSE)
 ![C++](https://img.shields.io/badge/c++-17-green.svg)