Loosen typescript requirement

Author: rdmurphy

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Loosened up `typescript` dependency to `^3`
+
 ## [0.1.0] - 2019-07-27
 
 ### Added

package.json

@@ -48,7 +48,7 @@
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-terser": "^5.1.1",
     "tiny-glob": "^0.2.6",
-    "typescript": "^3.5.3"
+    "typescript": "^3"
   },
   "devDependencies": {
     "@babel/node": "^7.5.0",