v3.1.0-beta.2

Changes:

• 5071084 bump version to 3.1.0-beta.2 (#3244)
• f238058 explicit read_timeout and write_timeout during hand/shake (#3249)
• 5cb0aac only apply full rewind to bitmap, not per block (#3246)
• 8a15007 ignore error from set_read_timeout (#3243)
• 6855241 handle mpsc channel disconnect from peer_write thread (#3241)
• 6bdeefd Fix warnings (#3240)
• bcf3e4e [Docs] Rangeproof output documentation (#3234)
• 3790b2c cleanup unused import (#3238)

This list of changes was auto generated.