Bump evergreen-ui from 4.17.0 to 4.18.1 (#148)

Bumps [evergreen-ui](https://github.com/segmentio/evergreen) from 4.17.0 to 4.18.1.
- [Release notes](https://github.com/segmentio/evergreen/releases)
- [Commits](segmentio/evergreen@v4.17.0...v4.18.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -23,7 +23,7 @@
   },
   "dependencies": {
     "dotenv": "^8.0.0",
-    "evergreen-ui": "^4.17.0",
+    "evergreen-ui": "^4.18.1",
     "firebase": "^6.2.4",
     "imagemin-optipng": "^7.0.0",
     "next": "^9.0.0",

yarn.lock

@@ -3715,10 +3715,10 @@ events@^3.0.0:
   resolved "https://registry.yarnpkg.com/events/-/events-3.0.0.tgz#9a0a0dfaf62893d92b875b8f2698ca4114973e88"
   integrity sha512-Dc381HFWJzEOhQ+d8pkNon++bk9h6cdAoAj4iE6Q4y6xgTzySWXlKn05/TVNpjnfRqi/X0EpJEJohPjNI3zpVA==
 
-evergreen-ui@^4.17.0:
-  version "4.17.0"
-  resolved "https://registry.yarnpkg.com/evergreen-ui/-/evergreen-ui-4.17.0.tgz#a42e4852edef52a6c7bcd2f3cf67390cab7dd0b7"
-  integrity sha512-9ycFaWrQBBy9ui9AQmXK4q7//d1DHwJNM7Zn1slqbY2RQ8Uuat1uf9mcnHBYGd5m1so1/Tz6xJUN4pc9gLQOBQ==
+evergreen-ui@^4.18.1:
+  version "4.18.1"
+  resolved "https://registry.yarnpkg.com/evergreen-ui/-/evergreen-ui-4.18.1.tgz#b277e05ae0beefbf361499a7148ff45b7db7cc31"
+  integrity sha512-JnUlyQe9J62DrIbalU8AUVCs7SQ58qjdlXTVutkeXj2mxi7XtJXZg+Er9ud9SaR6ZDLZVnuS35NOs3GPYe/68Q==
   dependencies:
     "@babel/runtime" "^7.1.2"
     "@blueprintjs/icons" "^3.2.0"