Remove Travis CI (superseded by self-hosted Drone) (#24)

.travis.yml

@@ -1,70 +0,0 @@
-dist: bionic
-language: python
-python:
-    - 3.6
-services:
-    - docker
-git:
-    submodules: false
-jobs:
-    include:
-    - stage: test
-      env:
-        - TEST="flake8 drakrun"
-      script:
-        - pip3 install flake8
-        - pip3 install -r drakrun/requirements.txt
-        - cd drakrun && flake8 --ignore E402,F401,E501
-    - stage: test
-      env:
-        - TEST="flake8 drakcore"
-      script:
-        - pip3 install flake8
-        - pip3 install -r drakcore/requirements.txt
-        - cd drakcore && flake8 --ignore E402,F401,E501
-    - stage: test
-      env:
-        - TEST="build frontend"
-      script:
-        - export NODE_OPTIONS=--max_old_space_size=4096
-        - cd drakcore/drakcore/frontend
-        - npm install
-        - npm run build
-    - stage: package
-      env:
-        - TEST="package build drakrun"
-      script:
-        - sh drakrun/package/build.sh;
-      before_deploy:
-        - git config --local user.name "drakrun-build"
-        - git config --local user.email "[email protected]"
-        - export TRAVIS_TAG=${TRAVIS_TAG:-$(date +'%Y%m%d%H%M%S')-$(git log --format=%h -1)}
-        - git tag $TRAVIS_TAG
-      deploy:
-        provider: releases
-        api_key: $GITHUB_TOKEN
-        edge: true
-        draft: true
-        file:
-          - out/**/*
-        on:
-          branch: master
-    - stage: package
-      env:
-        - TEST="package build drakcore"
-      script:
-        - sh drakcore/package/build.sh;
-      before_deploy:
-        - git config --local user.name "drakrun-build"
-        - git config --local user.email "[email protected]"
-        - export TRAVIS_TAG=${TRAVIS_TAG:-$(date +'%Y%m%d%H%M%S')-$(git log --format=%h -1)}
-        - git tag $TRAVIS_TAG
-      deploy:
-        provider: releases
-        api_key: $GITHUB_TOKEN
-        edge: true
-        draft: true
-        file:
-          - out/**/*
-        on:
-          branch: master