Update dependency prettier to v2.2.1

Author: renovate-bot

package.json

@@ -15,7 +15,7 @@
     "@sourcegraph/prettierrc": "3.0.3",
     "@types/node": "latest",
     "opn-cli": "4.1.0",
-    "prettier": "2.0.4",
+    "prettier": "2.2.1",
     "tslint": "5.20.1",
     "tslint-config-prettier": "1.18.0"
   },

yarn.lock

@@ -1168,10 +1168,10 @@ pify@^3.0.0:
   resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
   integrity sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=
 
-prettier@2.0.4:
-  version "2.0.4"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.0.4.tgz#2d1bae173e355996ee355ec9830a7a1ee05457ef"
-  integrity sha512-SVJIQ51spzFDvh4fIbCLvciiDMCrRhlN3mbZvv/+ycjvmF5E73bKdGfU8QDLNmjYJf+lsGnDBC4UUnvTe5OO0w==
+prettier@2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.2.1.tgz#795a1a78dd52f073da0cd42b21f9c91381923ff5"
+  integrity sha512-PqyhM2yCjg/oKkFPtTGUojv7gnZAoG80ttl45O6x2Ug/rMJw4wcc9k6aaf2hibP7BGVCCM33gZoGjyvt9mm16Q==
 
 process-nextick-args@~2.0.0:
   version "2.0.0"