FEATURE REQ: query ChainRegistryClient.getChainInfo by chain_id

in circumstances where the chains queried are unknown and the information about a chain needs to be gathered without prior knowledge beyond the chain id , it would be helpful to be able to query by chain_id (osmosis-1 or osmo-test-5, for example)
```
const chain = unknownData.ChainId; // osmosis-1

const client = new ChainRegistryClient({
chainNames: [chain]
});
const chainInfo = client.getChainInfo(chain);
```

chainInfo is returned as follows:

```
Chain Info: ChainInfo {
chainName: 'osmosis-1',
fetcher: ChainRegistryClient {
urls: [
'https://raw.githubusercontent.com/cosmos/chain-registry/master/osmosis-1/chain.json',
'https://raw.githubusercontent.com/cosmos/chain-registry/master/osmosis-1/assetlist.json'
],
_assetLists: [],
_chains: [],
_ibcData: [],
chainInfoList: [ [Circular *1] ],
_options: {
chainNames: [Array],
baseUrl: 'https://raw.githubusercontent.com/cosmos/chain-registry/master',
assetListNames: undefined,
ibcNamePairs: undefined
}
},
_chain: undefined,
_assetList: undefined,
_assetLists: [],
_ibcData: []
}
```

the URLs result in 404 NOT FOUND