Update node-sass to work in Mojave dev env (#1238)

CHANGELOG.md

@@ -1,6 +1,8 @@
 ## [`master`](https://github.com/elastic/eui/tree/master)
 
-- Add TypeScript definitions for `EuiFieldNumber, `EuiFormLabel` and `EuiSelect`, and fix the `EuiTextColor` definition. ([#1240](https://github.com/elastic/eui/pull/1240))
+- Added export for `TYPES` to `EuiAvatar` ([#1238](https://github.com/elastic/eui/pull/1238))
+- Updated node-sass dependency to support OSX Mojave ([#1238](https://github.com/elastic/eui/pull/1238))
+- Added TypeScript definitions for `EuiFieldNumber, `EuiFormLabel` and `EuiSelect`, and fix the `EuiTextColor` definition. ([#1240](https://github.com/elastic/eui/pull/1240))
 - Added support for nodes as column headers in `EuiBasicTable` for supporting things like tooltips and localized text. ([#1234](https://github.com/elastic/eui/pull/1234))
 
 ## [`4.4.1`](https://github.com/elastic/eui/tree/v4.4.1)

package.json

@@ -109,7 +109,7 @@
     "markdown-it": "8.4.1",
     "mocha": "^5.0.4",
     "moment": "^2.20.1",
-    "node-sass": "^4.5.3",
+    "node-sass": "^4.9.3",
     "nodegit": "^0.22.0",
     "npm-run": "^4.1.2",
     "pegjs": "^0.10.0",

src/components/avatar/avatar.js

@@ -20,7 +20,7 @@ const typeToClassNameMap = {
   user: 'euiAvatar--user',
 };
 
-const TYPES = Object.keys(typeToClassNameMap);
+export const TYPES = Object.keys(typeToClassNameMap);
 
 export const EuiAvatar = ({
   className,