ci: remove Travis config

.travis.yml

@@ -1,74 +0,0 @@
-language: node_js
-node_js:
-- lts/*
-env:
-  global:
-  - NODE_ENV=production
-  - NPM_TAG=latest
-  - RELEASE_TIMESTAMP="$(date +'%Y%m%d%H%M%S')"
-  matrix:
-  - NPM_SCRIPT="tap:unit -- --jobs=4"
-  - NPM_SCRIPT="tap:integration -- --jobs=4"
-cache:
-  directories:
-  - "$HOME/.npm"
-install:
-- npm ci --production=false
-script: npm run $NPM_SCRIPT
-jobs:
-    include:
-    - env: NPM_SCRIPT=lint
-    - env: NPM_SCRIPT=build
-      if: not (type != pull_request AND (branch =~ /^(develop|master|hotfix\/)/))
-    - stage: release
-      env: NPM_SCRIPT=build
-      before_deploy:
-      - >
-        if [ -z "$BEFORE_DEPLOY_RAN" ]; then
-          VPKG=$($(npm bin)/json -f package.json version)
-          export RELEASE_VERSION=${VPKG}-prerelease.${RELEASE_TIMESTAMP}
-          npm --no-git-tag-version version $RELEASE_VERSION
-          if [[ "$TRAVIS_BRANCH" == hotfix/* ]]; then # double brackets are important for matching the wildcard
-            export NPM_TAG=hotfix
-          fi
-          git config --global user.email "$(git log --pretty=format:"%ae" -n1)"
-          git config --global user.name "$(git log --pretty=format:"%an" -n1)"
-          export BEFORE_DEPLOY_RAN=true
-        fi
-      deploy:
-      - provider: npm
-        on:
-          branch:
-          - master
-          - develop
-          - hotfix/*
-          condition: $TRAVIS_EVENT_TYPE != cron
-        skip_cleanup: true
-        email: $NPM_EMAIL
-        api_key: $NPM_TOKEN
-        tag: $NPM_TAG
-      - provider: script
-        on:
-          branch:
-          - master
-          - develop
-          - hotfix/*
-          condition: $TRAVIS_EVENT_TYPE != cron
-        skip_cleanup: true
-        script: if npm info | grep -q $RELEASE_VERSION; then git tag $RELEASE_VERSION && git push https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git $RELEASE_VERSION; fi
-      - provider: script
-        on:
-          all_branches: true
-          condition: $TRAVIS_EVENT_TYPE != cron
-        skip_cleanup: true
-        script: npm run --silent deploy -- -x -r $GH_PAGES_REPO
-      - provider: script
-        on:
-          branch: develop
-          condition: $TRAVIS_EVENT_TYPE == cron
-        skip_cleanup: true
-        script: npm run i18n:src && npm run i18n:push
-stages:
-- test
-- name: release
-  if: type != pull_request AND (branch =~ /^(develop|master|hotfix\/)/)