Bump prettier version (Hacker0x01#1610)

* Bump prettier version

* Escape calendar test in January

* Bump prettier version

Author: martijnrusschen

yarn.lock

@@ -6066,8 +6066,9 @@ preserve@^0.2.0:
   integrity sha1-gV7R9uvGWSb4ZbMQwHE7yzMVzks=
 
 prettier@^1.9.2:
-  version "1.9.2"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.9.2.tgz#96bc2132f7a32338e6078aeb29727178c6335827"
+  version "1.15.3"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.15.3.tgz#1feaac5bdd181237b54dbe65d874e02a1472786a"
+  integrity sha512-gAU9AGAPMaKb3NNSUUuhhFAS7SCO4ALTN4nRIn6PJ075Qd28Yn2Ig2ahEJWdJwJmlEBTUfC7mMUSFy8MwsOCfg==
 
 pretty-format@^21.2.1:
   version "21.2.1"