feat(plugins/languages): count verified commits using user's gpg keys (#911)

tests/mocks/api/github/rest/users/listGpgKeysForUser.mjs

@@ -0,0 +1,25 @@
+/**Mocked data */
+export default function({ faker }, target, that, [{ username }]) {
+  console.debug("metrics/compute/mocks > mocking rest api result > rest.users.listGpgKeysForUser")
+  return ({
+    status: 200,
+    url: `https://api.github.com/users/${username}/`,
+    headers: {
+      server: "GitHub.com",
+      status: "200 OK",
+      "x-oauth-scopes": "repo",
+    },
+    data: [
+      {
+        key_id: faker.datatype.hexaDecimal(16),
+        raw_key: "-----BEGIN PGP PUBLIC KEY BLOCK-----\n(dummy content)\n-----END PGP PUBLIC KEY BLOCK-----",
+        emails: [
+          {
+            email: faker.internet.email(),
+            verified: true
+          }
+        ]
+      }
+    ],
+  })
+}