create-account — Increase default NEAR amount

[mikedotexe]

Is your feature request related to a problem? Please describe.

I created a new subaccount and tried deploying a contract, but got an error that the new account doesn't have enough NEAR for storage.

Describe the solution you'd like
Increase the default initialBalance to be higher, like 5 NEAR in order to not confuse folks, and to allow them to swiftly create accounts and use them