chore(deps): update dependency c8 to v7 (#112)

Author: renovate-bot

core/packages/teeny-request/package.json

@@ -47,7 +47,7 @@
     "@types/node-fetch": "^2.1.2",
     "@types/sinon": "^7.0.13",
     "@types/uuid": "^3.4.4",
-    "c8": "^6.0.0",
+    "c8": "^7.0.0",
     "codecov": "^3.1.0",
     "gts": "^1.0.0",
     "linkinator": "^1.5.0",