Improve ganache-core's GanacheOpts type and require it instead of any

packages/subproviders/src/subproviders/ganache.ts

@@ -15,7 +15,7 @@ export class GanacheSubprovider extends Subprovider {
      * Instantiates a GanacheSubprovider
      * @param opts The desired opts with which to instantiate the Ganache provider
      */
-    constructor(opts: any) {
+    constructor(opts: Ganache.GanacheOpts) {
         super();
         this._ganacheProvider = Ganache.provider(opts);
     }

packages/typescript-typings/types/ganache-core/index.d.ts

@@ -7,7 +7,9 @@ declare module 'ganache-core' {
         };
         port?: number;
         network_id?: number;
+        networkId?: number;
         mnemonic?: string;
+        gasLimit?: number;
     }
     // tslint:disable-next-line:completed-docs
     export function provider(opts: GanacheOpts): Provider;