Fix.

node_modules/opencollective-postinstall/README.md

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+# Open Collective postinstall
+
+Lightweight npm postinstall message to invite people to donate to your collective
+
+## Installation
+
+```
+npm install --save opencollective-postinstall
+```
+
+And in your `package.json` add:
+
+```json
+{
+  ...
+  "scripts": {
+    "postinstall": "opencollective-postinstall"
+  },
+  "collective": {
+    "url": "https://opencollective.com/webpack"
+  }
+  ...
+}
+```
+
+## Disabling this message
+
+In some places (e.g. CI) you may want to disable this output. You can do this by setting the environment variable `DISABLE_OPENCOLLECTIVE=true`.
+
+It will not be shown if npm's log level is set to silent (`--silent`), warn (`--quiet`), or error (`--loglevel error`).
+
+Note: This is a lightweight alternative to the [opencollective-cli](https://github.com/opencollective/opencollective-cli) that offers a more complete postinstall message with the current balance and ASCII logo of the collective.