message: refactor: remove lodash
diff: -import _ from 'lodash';
  -
  import { StacksTransaction } from './transaction';
  import { StacksNetwork, StacksMainnet, StacksTestnet } from '@stacks/network';
  @@ -186,7 +184,7 @@ export async function broadcastRawTransaction(
  };
  if (attachment) {
  - options = _.assign(options, {
  + options = Object.assign(options, {
  headers: {
  'Content-Type': 'application/json',
  },
  @@ -196,7 +194,7 @@ export async function broadcastRawTransaction(
  }),
  });
  } else {
  - options = _.assign(options, {
  + options = Object.assign(options, {
  headers: {
  'Content-Type': 'application/octet-stream',
  },
  