repository: Expand ~ in homedir

[Mattias-]

Fixes: #488

[codecov-io]

Codecov Report

Merging #489 (e39d2bc) into master (6a6548c) will decrease coverage by 0.30%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master     #489      +/-   ##
==========================================
- Coverage   70.38%   70.08%   -0.31%     
==========================================
  Files          24       24              
  Lines         726      732       +6     
==========================================
+ Hits          511      513       +2     
- Misses        144      146       +2     
- Partials       71       73       +2     

Impacted Files	Coverage Δ
pkg/cmd/cmd.go	86.36% <ø> (ø)
pkg/tokencache/repository/repository.go	54.54% <33.33%> (-3.35%)	⬇️

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