chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

Author: greenkeeperio-bot

yarn.lock

@@ -105,9 +105,11 @@
   dependencies:
     inversify "^4.11.1"
 
-"@robotlegsjs/signals@^0.1.1":
-  version "0.1.1"
-  resolved "https://registry.npmjs.org/@robotlegsjs/signals/-/signals-0.1.1.tgz#951d850955dc2447887685b90bff5a57e79c16b9"
+"@robotlegsjs/signals@^0.2.0":
+  version "0.2.0"
+  resolved "https://registry.npmjs.org/@robotlegsjs/signals/-/signals-0.2.0.tgz#a3f272ccd8bdb91771f3ac0fef9c997e2c0ebc8a"
+  dependencies:
+    tslib "^1.9.3"
 
 "@sinonjs/formatio@^2.0.0":
   version "2.0.0"
@@ -6764,7 +6766,7 @@ ts-node@^7.0.0:
     source-map-support "^0.5.6"
     yn "^2.0.0"
 
-tslib@^1.8.0, tslib@^1.8.1, tslib@^1.9.0:
+tslib@^1.8.0, tslib@^1.8.1, tslib@^1.9.0, tslib@^1.9.3:
   version "1.9.3"
   resolved "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz#d7e4dd79245d85428c4d7e4822a79917954ca286"