Quick Fix for ChainX v3.0.0

Global Priority

• LOW: This is a low priority release

Change

• runtime version: 10 -> 11
• use partition_point instead of binary_search_by_key.
  see paritytech/substrate#9049

md5sum

• chainx_runtime.compact.wasm-20200930: 7f8690d5f308a5f908ad7c9b76c61d5f
• chainx-v3.0.0-fix-ubuntu-20.04-x86_64: 50b04a0d3bc253cee0a8a4438236be9b