Bump deps, type import on generated (#2075)

* Bump deps, type import on generated

* type imports in types/types

* Re-export defs

* Split imports/exports

* Additional type import

* Remove import type

* Remove dupes

packages/metadata/package.json

@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-metadata#readme",
   "dependencies": {
-    "@babel/runtime": "^7.8.7",
+    "@babel/runtime": "^7.9.0",
     "@polkadot/types": "1.8.0-beta.7",
     "@polkadot/util": "^2.6.2",
     "@polkadot/util-crypto": "^2.6.2",

packages/metadata/src/Metadata/MagicNumber.ts

@@ -15,7 +15,7 @@ export default class MagicNumber extends U32 {
     super(registry, value);
 
     if (!this.isEmpty) {
-      const magic = new U32(registry, MAGIC_NUMBER);
+      const magic = registry.createType('u32', MAGIC_NUMBER);
 
       assert(this.eq(magic), `MagicNumber mismatch: expected ${magic.toHex()}, found ${this.toHex()}`);
     }