build: release v1.4.0

[jaybxyz]

Description

This PR releases v1.4.0 from develop branch to master branch

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Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #442 (aa1af26) into master (02644bb) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #442   +/-   ##
=======================================
  Coverage   85.10%   85.10%           
=======================================
  Files          23       23           
  Lines        2618     2618           
=======================================
  Hits         2228     2228           
  Misses        226      226           
  Partials      164      164           

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[dongsam]

LGTM