chore(deps): update dependency typescript to v3.1.1 (#234)

Author: renovate[bot]

package.json

@@ -64,7 +64,7 @@
     "rollup-plugin-terser": "3.0.0",
     "semantic-release": "15.9.16",
     "ts-jest": "23.10.2",
-    "typescript": "3.0.3"
+    "typescript": "3.1.1"
   },
   "keywords": [
     "behavior-smooth",

yarn.lock

@@ -7279,9 +7279,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@3.0.3:
-  version "3.0.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.0.3.tgz#4853b3e275ecdaa27f78fda46dc273a7eb7fc1c8"
+typescript@3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.1.tgz#3362ba9dd1e482ebb2355b02dfe8bcd19a2c7c96"
 
 uglify-js@^2.6:
   version "2.8.29"