use older nodejs version (newer version is not compatible with dependencies)

Author: knoxfighter

.travis.yml

@@ -22,7 +22,7 @@ jobs:
       go: 1.x
       os: linux
       before_install:
-        - curl -sL https://deb.nodesource.com/setup_13.x | sudo -E bash -
+        - curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -
         - sudo apt-get install -y nodejs
       script:
         - make gen_release
@@ -37,4 +37,4 @@ jobs:
           tags: true
         file:
           - ~/factorio-server-manager-linux-${TRAVIS_TAG}.zip
-          - ~/factorio-server-manager-windows-${TRAVIS_TAG}.zip
+          - ~/factorio-server-manager-windows-${TRAVIS_TAG}.zip