Try to fix snap

snapcraft.yaml

@@ -83,7 +83,7 @@ parts:
         plugin: nodejs
         node-engine: 8.12.0
         node-packages:
-            - npm
+            - npm@6.4.1
             - node-gyp
             - node-pre-gyp
             - fibers@2.0.0
@@ -124,7 +124,7 @@ parts:
             #paxctl -mC `which node`
             echo "Installing meteor"
             curl https://install.meteor.com/ -o install_meteor.sh
-            sed -i "s|RELEASE=.*|RELEASE=\"1.8.1-beta.0\"|g" install_meteor.sh
+            #sed -i "s|RELEASE=.*|RELEASE=\"1.8.1-beta.0\"|g" install_meteor.sh
             chmod +x install_meteor.sh
             sh install_meteor.sh
             rm install_meteor.sh