refactor: use types test from interface-ipfs-core (#886)

The test for types also exists in interface-ipfs-core, which is the
central test repository for both js-ipfs and js-http-api tests.
Pulling in the test once from there is enough.

Author: vmx

test/interface.spec.js

@@ -266,7 +266,7 @@ describe('interface-ipfs-core tests', () => {
     }
   }))
 
-  tests.types(defaultCommonFactory, { skip: { reason: 'FIXME currently failing' } })
+  tests.types(defaultCommonFactory)
 
   tests.util(defaultCommonFactory, { skip: { reason: 'FIXME currently failing' } })
 })