Bump v1.2.0

[lucklove]

No description provided.

[codecov-commenter]

Codecov Report

Merging #826 into master will increase coverage by 3.96%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #826      +/-   ##
==========================================
+ Coverage   49.02%   52.99%   +3.96%     
==========================================
  Files         249      261      +12     
  Lines       18585    18999     +414     
==========================================
+ Hits         9112    10069     +957     
+ Misses       8077     7379     -698     
- Partials     1396     1551     +155     

Flag	Coverage Δ
#cluster	44.84% <ø> (+2.09%)	⬆️
#dm	25.32% <ø> (+0.08%)	⬆️
#integrate	47.82% <ø> (+1.72%)	⬆️
#playground	22.17% <ø> (?)
#tiup	10.79% <ø> (ø)
#unittest	20.76% <ø> (ø)

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

Impacted Files	Coverage Δ
pkg/version/version.go	84.61% <ø> (ø)
components/playground/instance/tiflash.go	0.00% <0.00%> (ø)
components/playground/instance/tikv_config.go	100.00% <0.00%> (ø)
components/playground/instance/pd.go	70.21% <0.00%> (ø)
components/playground/instance/pump.go	0.00% <0.00%> (ø)
components/playground/instance/instance.go	36.36% <0.00%> (ø)
...onents/playground/instance/tiflash_proxy_config.go	0.00% <0.00%> (ø)
components/playground/instance/tidb.go	77.14% <0.00%> (ø)
components/playground/instance/tikv.go	66.66% <0.00%> (ø)
components/playground/instance/drainer.go	0.00% <0.00%> (ø)
... and 29 more

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