v2.0.4

Summary

v2.0.4 is also an maintenance release after the latest release v2.0.3. It
comes with two API fixes.

Bug Fix and Performance Improvements:

1. [API] increase limit for eth_subscribe (#4374)
2. [API] fix estimateGas for migrateStake transaction (#4377)

Upgrade Priority

v2.0.4 does not have a hardfork, but contains an API fix.
All API nodes are recommended to upgrade to v2.0.4 in order to provide the most
up-to-date results and service

Node type	Action
Delegate	Not required
Fullnode	Not required
API node	Recommended

Important Commits (not a complete list)

1. [API] increase api listener limit #4374
2. [api] fix estimateGas for migrateStake #4377