chore: Make puppeteer optional

Puppeteer downloads and installs Chrome at the same time as installing node packages, which slows down the installation considerably, especially during CI. Making it optional allows you to better control when you run your installation.

package.json

@@ -127,7 +127,6 @@
     "postcss-loader": "2.1.6",
     "pretty": "2.0.0",
     "prop-types": "15.7.2",
-    "puppeteer": "21.6.1",
     "react": "16.12.0",
     "react-dom": "16.12.0",
     "react-hot-loader": "^4.3.11",
@@ -185,7 +184,6 @@
     "cozy-harvest-lib": "^6.7.3",
     "cozy-intent": ">=1.3.0",
     "cozy-sharing": ">=14.1.0",
-    "puppeteer": "^1.20.0",
     "react": "^16.8.6",
     "react-dom": "^16.8.6"
   },
@@ -206,5 +204,8 @@
   },
   "browserslist": [
     "extends browserslist-config-cozy"
-  ]
+  ],
+  "optionalDependencies": {
+    "puppeteer": "21.11.0"
+  }
 }