Release v1.4.0

[jason-aelf]

Closes #3403

[codecov]

Codecov Report

Merging #3404 (c0f24b9) into master (a0804d7) will decrease coverage by 0.33%.
The diff coverage is 71.84%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3404      +/-   ##
==========================================
- Coverage   90.92%   90.60%   -0.33%     
==========================================
  Files         640      653      +13     
  Lines       24015    24356     +341     
  Branches     2104     2142      +38     
==========================================
+ Hits        21835    22067     +232     
- Misses       2075     2184     +109     
  Partials      105      105              

Impacted Files	Coverage Δ
...Blockchain/Application/IBlockValidationProvider.cs	92.15% <ø> (ø)
...artContract/Application/IBlockchainStateService.cs	100.00% <ø> (ø)
...xecution/Application/BlockchainExecutingService.cs	100.00% <ø> (ø)
src/AElf.Kernel.Types/Block/BlockHeader.cs	92.68% <0.00%> (-2.44%)	⬇️
....Core/Network/Events/StreamMessageReceivedEvent.cs	0.00% <0.00%> (ø)
...OS.Core/Network/Events/StreamPeerExceptionEvent.cs	0.00% <0.00%> (ø)
...AElf.OS.Core/Network/Protocol/HandshakeProvider.cs	94.11% <ø> (ø)
....Core/Network/Protocol/Types/PeerConnectionInfo.cs	0.00% <0.00%> (ø)
...lf.OS.Network.Grpc/Connection/ConnectionService.cs	94.44% <ø> (ø)
...f.OS/Handlers/Network/BlockReceivedEventHandler.cs	0.00% <ø> (ø)
... and 20 more