Remove all internal usage of the Json types

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

packages/errors/api-report.md

@@ -3,7 +3,7 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
-import { JsonObject } from '@backstage/config';
+import { JsonObject } from '@backstage/types';
 
 // @public
 export function assertError(value: unknown): asserts value is ErrorLike;

packages/errors/package.json

@@ -30,7 +30,7 @@
     "clean": "backstage-cli clean"
   },
   "dependencies": {
-    "@backstage/config": "^0.1.9",
+    "@backstage/types": "^0.1.1",
     "cross-fetch": "^3.0.6",
     "serialize-error": "^8.0.1"
   },

packages/errors/src/serialization/error.ts

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { JsonObject } from '@backstage/config';
+import { JsonObject } from '@backstage/types';
 import {
   deserializeError as deserializeErrorInternal,
   serializeError as serializeErrorInternal,