fix: Terraform0.12 compatibility

[thazelart]

fixes #25

[codecov]

Codecov Report

Merging #26 into master will decrease coverage by 0.97%.
The diff coverage is 98.14%.

@@            Coverage Diff             @@
##           master      #26      +/-   ##
==========================================
- Coverage      99%   98.03%   -0.98%     
==========================================
  Files           6        7       +1     
  Lines         202      305     +103     
==========================================
+ Hits          200      299      +99     
- Misses          1        3       +2     
- Partials        1        3       +2

Impacted Files	Coverage Δ
internal/fs/file.go	100% <ø> (ø)	⬆️
internal/fs/folder.go	100% <ø> (ø)	⬆️
internal/checks/checks.go	100% <100%> (ø)
internal/config/config.go	97.26% <100%> (-0.21%)	⬇️
pkg/utils/utils.go	100% <100%> (ø)
internal/hcl/hcl_getter.go	100% <100%> (ø)
internal/hcl/hcl_parse.go	96.22% <96.22%> (ø)
... and 1 more

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