fix(install): Properly escape cli installation info cross-platform

Author: axe312ger

package.json

@@ -6,7 +6,7 @@
   "engines": {
     "node": ">=6"
   },
-  "bin": { 
+  "bin": {
     "contentful-import": "./bin/contentful-import"
   },
   "scripts": {
@@ -35,7 +35,7 @@
     "devdep:uninstall": "npm run devdep:clean && rimraf node_modules/contentful-batch-libs",
     "precommit": "npm run lint",
     "prepush": "npm run test:unit",
-    "postinstall": "echo We moved the CLI version of this tool into our Contentful CLI.\nThis allows our users to use and install only one single CLI tool to get the full Contentful experience.\nFor more info please visit https://github.com/contentful/contentful-cli/tree/master/docs/space/import"
+    "postinstall": "echo-cli '\\nWe moved the CLI version of this tool into our Contentful CLI.\\nThis allows our users to use and install only one single CLI tool to get the full Contentful experience.\\n\\nFor more info please visit https://github.com/contentful/contentful-cli/tree/master/docs/space/import'"
   },
   "repository": {
     "type": "git",
@@ -55,6 +55,7 @@
     "cli-table3": "^0.5.0",
     "contentful-batch-libs": "^9.0.0",
     "contentful-management": "^5.0.0",
+    "echo-cli": "^1.0.8",
     "joi": "^13.1.2",
     "listr": "^0.13.0",
     "listr-update-renderer": "^0.4.0",