feat(plugins/sponsors): add plugin_sponsors_past (#958) [skip ci]

tests/mocks/api/github/graphql/sponsors.all.mjs

@@ -0,0 +1,19 @@
+/**Mocked data */
+export default function({ faker, query, login = faker.internet.userName() }) {
+  console.debug("metrics/compute/mocks > mocking graphql api result > sponsors/all")
+  return ({
+    user: {
+      sponsorsActivities: {
+        nodes: new Array(10).fill(null).map(_ => ({
+          sponsor: {
+            login: faker.internet.userName(),
+            avatarUrl: null,
+          },
+          sponsorsTier: {
+            monthlyPriceInDollars: faker.datatype.number(10),
+          },
+        })),
+      },
+    },
+  })
+}