chore: add support to get networks

Author: sondreb

src/Provider.ts

@@ -48,6 +48,11 @@ export class Provider {
     return this.baseUrl;
   }
 
+  //** Returns the result from the officially hosted list of Blockcore supported chains. */
+  public getNetworks<AxiosResponse>(): Promise<AxiosResponse | undefined> {
+    return this.executeGet('https://chains.blockcore.net/CHAINS.json')
+  }
+
   public getSupply<AxiosResponse>(): Promise<AxiosResponse | undefined> {
     return this.executeGet(this.baseUrl + "/api/insight/supply")
   }

test/Provider.test.ts

@@ -36,6 +36,11 @@ describe("Provider test suit", () => {
   //   return expect(provider.getAddress(getSupplyMock)).resolves.toMatchObject(someResponse);
   // })
 
+  it('should get networks', async () => {
+    let result: any = await provider.getNetworks();
+    expect(result.data[0].symbol).toMatch('BTC');
+  })
+
   it('should get correct network url', async () => {
     let result = await provider.getNetworkUrl('CITY');
     expect(result).toMatch('https://city.indexer.blockcore.net');