fixing odd behaviour in old npm version

Author: mansona

package.json

@@ -45,6 +45,7 @@
     "eslint-plugin-ember": "^6.4.1",
     "eslint-plugin-node": "^8.0.1",
     "glob": "^7.1.4",
+    "json": "^9.0.6",
     "loader.js": "^4.7.0",
     "mocha": "^6.1.4",
     "mockery": "^2.1.0",

run-smoke-test.sh

@@ -8,6 +8,9 @@ mv ember-try*.tgz "ember-try-${now}.tgz"
 if [[ $npm_execpath =~ ^.*yarn.*$ ]]; then
   cd smoke-test-app && yarn upgrade "ember-try@file:../ember-try-${now}.tgz" && yarn install && "./${1}"
 else
-  cd smoke-test-app && npm install --save-dev "../ember-try-${now}.tgz" && npm install && "./${1}"
+  if [[ $(npm -v | cut -d '.' -f 1) -lt 5 ]]; then
+    cd smoke-test-app && json -I -f package.json -e "this.devDependencies['ember-try']='../ember-try-${now}.tgz'" && npm install && "./${1}"
+  else
+    cd smoke-test-app && npm install --save-dev "../ember-try-${now}.tgz" && npm install && "./${1}"
+  fi
 fi
-