Update dependency eslint-config-prettier to v6

package.json

@@ -24,7 +24,7 @@
   "devDependencies": {
     "codecov": "3.0.2",
     "eslint": "4.19.1",
-    "eslint-config-prettier": "2.9.0",
+    "eslint-config-prettier": "6.1.0",
     "eslint-plugin-prettier": "2.6.0",
     "fhir-errors": "1.0.0",
     "prettier": "1.12.1",

yarn.lock

@@ -637,11 +637,11 @@ escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.3, escape-string-regexp@^
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
-eslint-config-prettier@2.9.0:
-  version "2.9.0"
-  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-2.9.0.tgz#5ecd65174d486c22dff389fe036febf502d468a3"
+eslint-config-prettier@6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-6.1.0.tgz#e6f678ba367fbd1273998d5510f76f004e9dce7b"
   dependencies:
-    get-stdin "^5.0.1"
+    get-stdin "^6.0.0"
 
 [email protected]:
   version "2.6.0"
@@ -930,9 +930,9 @@ get-caller-file@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-1.0.2.tgz#f702e63127e7e231c160a80c1554acb70d5047e5"
 
-get-stdin@^5.0.1:
-  version "5.0.1"
-  resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-5.0.1.tgz#122e161591e21ff4c52530305693f20e6393a398"
+get-stdin@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-6.0.0.tgz#9e09bf712b360ab9225e812048f71fde9c89657b"
 
 get-stream@^3.0.0:
   version "3.0.0"