lint: reenable tslint prefer-conditional-expression, fix

[bitjson]

No description provided.

[codecov]

Codecov Report

Merging #8084 into master will increase coverage by <.01%.
The diff coverage is 28.57%.

@@            Coverage Diff             @@
##           master    #8084      +/-   ##
==========================================
+ Coverage   27.27%   27.28%   +<.01%     
==========================================
  Files          23       23              
  Lines        2621     2613       -8     
  Branches      391      389       -2     
==========================================
- Hits          715      713       -2     
+ Misses       1883     1877       -6     
  Partials       23       23

Impacted Files	Coverage Δ
src/providers/language/language.ts	58.82% <0%> (+3.26%)	⬆️
src/providers/bwc-error/bwc-error.ts	6.54% <0%> (+0.17%)	⬆️
src/providers/logger/logger.ts	63.15% <0%> (+1.08%)	⬆️
src/providers/persistence/persistence.ts	43.98% <100%> (-0.24%)	⬇️
src/providers/release/release.ts	96.96% <0%> (-0.09%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 322451a...bcdfe73. Read the comment docs.

[cmgustavo]

ACK