chore(deps): update dependency typescript to v3.1.2 (#256)

Author: renovate[bot]

package.json

@@ -64,7 +64,7 @@
     "rollup-plugin-terser": "3.0.0",
     "semantic-release": "15.9.17",
     "ts-jest": "23.10.4",
-    "typescript": "3.1.1"
+    "typescript": "3.1.2"
   },
   "keywords": [
     "behavior-smooth",

yarn.lock

@@ -8081,10 +8081,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@3.1.1:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.1.tgz#3362ba9dd1e482ebb2355b02dfe8bcd19a2c7c96"
-  integrity sha512-Veu0w4dTc/9wlWNf2jeRInNodKlcdLgemvPsrNpfu5Pq39sgfFjvIIgTsvUHCoLBnMhPoUA+tFxsXjU6VexVRQ==
+typescript@3.1.2:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.2.tgz#c03a5d16f30bb60ad8bb6fe8e7cb212eedeec950"
+  integrity sha512-gOoGJWbNnFAfP9FlrSV63LYD5DJqYJHG5ky1kOXSl3pCImn4rqWy/flyq1BRd4iChQsoCqjbQaqtmXO4yCVPCA==
 
 uglify-js@^2.6:
   version "2.8.29"