Release version 0.5.0

Changelog and setup updated to 0.4.1; floating-point support for /del…

…ay endpoint

Merge pull request postmanlabs#267 from luhkevin/luhkevin/pull/277

Changelog and setup updated for floating point support

Merge pull request postmanlabs#267 from luhkevin/luhkevin/pull/277

Changelog and setup updated for floating point support

Merge pull request postmanlabs#266 from luhkevin/dev

Floating point type conversion

Merge pull request postmanlabs#266 from luhkevin/dev

Floating point type conversion

bump version

Merge pull request postmanlabs#259 from Lukasa/chunked

Do not forcefully emit Transfer-Encoding header

version bump to v0.3.0

version bump to v0.3.0