npm run test fails (async.spec.js) after clean clone and npm install

[timheilman]

To reproduce:

git clone git@github.com:ajv-validator/ajv-merge-patch.git
cd ajv-merge-patch
npm i
npm test

Expected: all tests pass
Actual:

  1) async schema loading
       $merge
         should load missing schemas:
     TypeError: resolver.resolve is not a function
      at resolveUrl (node_modules/ajv/dist/compile/resolve.js:90:21)
...
  2) async schema loading
       $patch
         should load missing schemas:
     TypeError: resolver.resolve is not a function
      at resolveUrl (node_modules/ajv/dist/compile/resolve.js:90:21)

This is due to a change introduced in ajv v8.10.0 which is pulled by the devDependency "ajv": "^8.2.0". Specifically,

ajv-validator/ajv@0e47ab4

This very short PR fixes this issue in the same technique as that commit in ajv.