Move contracts classes to srml/contracts (now as types-only) (#1153)

* Move contracts classes to srml/contracts (now as types-only)

* Exclude srml generated files from codeclimate

* Alos excluse types/src/scripts

* Replace Compact<T>.toBn() with unwrap()

* Fic compact type (#1156)

* Remove as unknown as T (T typing is working)

* Move interfaces back to the relevant types.ts

packages/api-metadata/src/consts/fromMetadata/fromMetadata.spec.ts

@@ -4,9 +4,12 @@
 
 import { Metadata, BlockNumber } from '@polkadot/types';
 import json from '@polkadot/types/Metadata/v6/static';
+import { injectDefinitions } from '@polkadot/types/Metadata/util/testUtil';
 
 import fromMetadata from '../fromMetadata';
 
+injectDefinitions();
+
 // Use the pre-generated metadata
 const metadata = new Metadata(json);
 const consts = fromMetadata(metadata);