add v1.8.0 changelog

[thinkerou]

@appleboy please review, thanks!

and update Authors.md

[codecov]

Codecov Report

Merging #3160 (2c89c71) into master (60e24d5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3160   +/-   ##
=======================================
  Coverage   98.22%   98.22%           
=======================================
  Files          43       43           
  Lines        3148     3148           
=======================================
  Hits         3092     3092           
  Misses         44       44           
  Partials       12       12           

Flag	Coverage Δ
go-1.14	98.22% <ø> (ø)
go-1.15	98.06% <ø> (ø)
go-1.16	98.03% <ø> (ø)
go-1.17	97.96% <ø> (ø)
go-1.18	97.96% <ø> (ø)
macos-latest	98.22% <ø> (ø)
nomsgpack	98.19% <ø> (ø)
ubuntu-latest	98.22% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
binding/toml.go	100.00% <ø> (ø)
binding/uri.go	100.00% <ø> (ø)

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