feat(requestEIP6963Providers): return-type

Add return type to requestEIP6963Providers function signature.

Closes #7238

Author: Dan Forbes

packages/web3/src/web3_eip6963.ts

@@ -35,6 +35,8 @@ export interface EIP6963ProviderDetail<API = Web3APISpec> {
   provider: EIP1193Provider<API>;
 }
 
+export type EIP6963ProviderResponse<API = Web3APISpec> = Map<string, EIP6963ProviderDetail<API>>;
+
 export interface EIP6963AnnounceProviderEvent<API = Web3APISpec> extends CustomEvent {
   type: Eip6963EventName.eip6963announceProvider;
   detail: EIP6963ProviderDetail<API>;
@@ -52,7 +54,7 @@ export interface EIP6963ProvidersMapUpdateEvent extends CustomEvent {
   detail: Map<string, EIP6963ProviderDetail>;
 }
 
-export const requestEIP6963Providers = async () => 
+export const requestEIP6963Providers = async (): Promise<EIP6963ProviderResponse> =>
    new Promise((resolve, reject) => {
     if (typeof window === 'undefined') {
       reject(new Error("window object not available, EIP-6963 is intended to be used within a browser"));