fix: upgrade ava from 3.6.0 to 3.7.0

Snyk has created this PR to upgrade ava from 3.6.0 to 3.7.0.

See this package in NPM:
https://www.npmjs.com/package/ava

See this project in Snyk:
https://app.snyk.io/org/freaktechnik/project/ae100812-3da9-4011-80e5-81841567e9dd?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -46,7 +46,7 @@
     "@ava/babel": "^1.0.1",
     "@freaktechnik/eslint-config-node": "^7.1.0",
     "@freaktechnik/eslint-config-test": "^7.1.0",
-    "ava": "^3.6.0",
+    "ava": "^3.7.0",
     "codecov": "^3.6.1",
     "eslint": "^6.8.0",
     "express": "^4.17.1",