remove Travis: GitHub CI is a lot faster and more reliable

.travis.yml

@@ -1,89 +0,0 @@
-language: c
-matrix:
-  include:
-    - os: linux
-      name: "linux"
-      dist: xenial
-      sudo: required
-      addons:
-        apt:
-          packages:
-            - build-essential
-            - libglfw3
-            - libglfw3-dev
-            - libfreetype6-dev
-            - libssl-dev
-    - os: windows
-      name: "windows_gcc"
-      language: bash
-      filter_secrets: false
-    - os: windows
-      name: "windows_msvc"
-      language: bash
-      filter_secrets: false
-    - os: osx
-      name: "osx"
-      osx_image: xcode10.3
-      addons:
-        homebrew:
-          packages:
-            - freetype
-            - glfw
-            - openssl
-script:
-  - |
-    if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then
-      export LIBRARY_PATH=$LIBRARY_PATH:/usr/local/opt/openssl/lib/
-    fi
-  - |
-    if [[ "${TRAVIS_OS_NAME}" == "windows" ]]; then
-      ### troubleshooting and diagnostics: show ALL environment variables in the instance
-      #set
-      set -e
-      git clone --depth=1 https://github.com/ubawurinna/freetype-windows-binaries  thirdparty/freetype/
-
-      if [[ "${TRAVIS_JOB_NAME}" == "windows_gcc" ]]; then
-        echo "Building V with GCC"
-        export VFLAGS="-os windows"
-        ./make.bat -gcc
-      fi
-      if [[ "${TRAVIS_JOB_NAME}" == "windows_msvc" ]]; then
-        echo "Building V with MSVC"
-        export VFLAGS="-os msvc"
-        ./make.bat -msvc
-      fi
-
-      ./v.exe test v
-      set +e
-    fi
-  - |
-    if [[ "${TRAVIS_OS_NAME}" != "windows" ]]; then
-      make
-      ./v -o v compiler
-      ./v test v
-    fi
-  - |
-    if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
-      ## aliases do not work for some reason in travis, just use full commands :-|
-      echo "Nodejs version:"
-      node --version      
-      # Build hi.js
-      echo "fn main(){ println('Hello from V.js') }" > hi.v
-      ./v -o hi.js hi.v
-      node hi.js
-    fi
-  - |
-    if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then
-      echo "Nodejs version:"
-      node --version      
-      # Build hi.js
-      echo "fn main(){ println('Hello from V.js') }" > hi.v
-      ./v -o hi.js hi.v
-      node hi.js
-    fi
-  - |
-    if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then
-      # Build Vid
-      git clone https://github.com/vlang/vid
-      cd vid && ../v -debug -o vid .
-    fi