install-release.sh将所有exit改为return，并在适当的地方增删return，目的是增加脚本可读性

[sunshineplan]

No description provided.

[codecov]

Codecov Report

Merging #1041 into master will decrease coverage by 0.1%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #1041      +/-   ##
=========================================
- Coverage    75.2%   75.1%   -0.11%     
=========================================
  Files         225     225              
  Lines        9986    9986              
=========================================
- Hits         7510    7500      -10     
- Misses       1766    1773       +7     
- Partials      710     713       +3

Impacted Files	Coverage Δ
proxy/socks/client.go	72.15% <0%> (-2.54%)	⬇️
transport/internet/headers/http/http.go	79.43% <0%> (-2.13%)	⬇️
app/proxyman/mux/mux.go	54.83% <0%> (-1.62%)	⬇️
transport/internet/kcp/sending.go	87.11% <0%> (-1.34%)	⬇️
transport/ray/direct.go	86.76% <0%> (+1.47%)	⬆️

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[DarienRaymond]

把help放到check之后的用意是什么？

[sunshineplan]

其实没调顺序，checkUpdate后面也要加&& return的，是在另外一个pr里面提交的，所以这条只提交了Help和remove部分的修改，看上去好像的确改变顺序了。是否先合并了我再调整下？
PS：原来可以再调整的，我现在已经调整到原来的顺序了。