Changed linux image to setup nodejs_12

.travis.yml

@@ -10,8 +10,8 @@ matrix:
         - MATRIX_EVAL="brew install gcc && CC=gcc-7 && CXX=g++-7"
 
     - os: linux
-      services: docker
-      language: generic
+      language: node_js
+      node_js: "12"
       addons:
         apt:
           sources:
@@ -42,12 +42,7 @@ jobs:
       script:
         - |
           if [ "$TRAVIS_OS_NAME" == "linux" ]; then
-            docker run --rm \
-              --env-file <(env | grep -iE 'DEBUG|NODE_|ELECTRON_|YARN_|NPM_|CI|CIRCLE|TRAVIS|APPVEYOR_|CSC_|_TOKEN|_KEY|AWS_|STRIP|BUILD_') \
-              -v ${PWD}:/project \
-              -v ~/.cache/electron:/root/.cache/electron \
-              -v ~/.cache/electron-builder:/root/.cache/electron-builder \
-              /bin/bash -c "npm run publish:linux"
+            npm run publish:linux
           else
             npm run publish:mac
           fi