Refactor + initial test for the StrategyInterface

[bravo-kernel]

Please note: maxLength for type 'string' MUST be an integer, see 6.3.1

[codecov]

Codecov Report

Merging #8 into master will increase coverage by 0.38%.
The diff coverage is 33.33%.

@@            Coverage Diff            @@
##           master      #8      +/-   ##
=========================================
+ Coverage   71.52%   71.9%   +0.38%     
=========================================
  Files          12      12              
  Lines         302     299       -3     
=========================================
- Hits          216     215       -1     
+ Misses         86      84       -2

Impacted Files	Coverage Δ
lib/type-mapper.js	37.63% <33.33%> (-1.95%)	⬇️
lib/strategy-interface.js	27.27% <0%> (+18.18%)	⬆️

---

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 d9a954d...9ddd214. Read the comment docs.

[codecov]

Codecov Report

Merging #8 into master will increase coverage by 0.38%.
The diff coverage is 33.33%.

@@            Coverage Diff            @@
##           master      #8      +/-   ##
=========================================
+ Coverage   71.52%   71.9%   +0.38%     
=========================================
  Files          12      12              
  Lines         302     299       -3     
=========================================
- Hits          216     215       -1     
+ Misses         86      84       -2

Impacted Files	Coverage Δ
lib/type-mapper.js	37.63% <33.33%> (-1.95%)	⬇️
lib/strategy-interface.js	27.27% <0%> (+18.18%)	⬆️

---

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 d9a954d...9ddd214. Read the comment docs.