Upgrade ts-jest to v23.1.1

v23.1.0 raises the error "Cannot find module '@babel/core'" while
running tests.

See kulshekhar/ts-jest#651.

Author: yhatt

package.json

@@ -52,7 +52,7 @@
     "stylelint-config-prettier": "^3.3.0",
     "stylelint-config-standard": "^18.2.0",
     "stylelint-scss": "^3.2.0",
-    "ts-jest": "^23.1.0",
+    "ts-jest": "^23.1.1",
     "tslint": "^5.11.0",
     "tslint-config-airbnb": "^5.9.2",
     "tslint-config-prettier": "^1.14.0",

yarn.lock

@@ -5198,9 +5198,9 @@ trough@^1.0.0:
   dependencies:
     glob "^6.0.4"
 
-ts-jest@^23.1.0:
-  version "23.1.0"
-  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-23.1.0.tgz#1d193a3b51d78793062f1f9137629f8921301aa1"
+ts-jest@^23.1.1:
+  version "23.1.1"
+  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-23.1.1.tgz#2f2236d2e0e9e796125bb0d36833da9cc58efc46"
   dependencies:
     closest-file-data "^0.1.4"
     fs-extra "6.0.1"