feat: support for nested pointer struct

[bxcodec]

Proposed changes:

• Support for nested Pointer struct

close #16

[codecov]

Codecov Report

Merging #17 into master will decrease coverage by 1.61%.
The diff coverage is 92.68%.

@@            Coverage Diff             @@
##           master      #17      +/-   ##
==========================================
- Coverage     100%   98.38%   -1.62%     
==========================================
  Files           8        8              
  Lines         380      371       -9     
==========================================
- Hits          380      365      -15     
- Misses          0        3       +3     
- Partials        0        3       +3

Impacted Files	Coverage Δ
faker.go	96.34% <92.68%> (-3.66%)	⬇️

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