Update tempy requirement from ^0.2.1 to ^0.3.0 (#980)

Updates the requirements on [tempy](https://github.com/sindresorhus/tempy) to permit the latest version.
- [Release notes](https://github.com/sindresorhus/tempy/releases)
- [Commits](sindresorhus/tempy@v0.2.1...v0.3.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -49,7 +49,7 @@
     "nyc": "^14.0.0",
     "pkg-up": "^3.0.1",
     "sinon": "^7.0.0",
-    "tempy": "^0.2.1"
+    "tempy": "^0.3.0"
   },
   "engines": {
     "node": ">= 8.0"