validate Pointer - Numerics assignments if it is no perfect match

[flavioBachmann]

Resolved Issue #395 by validating Pointers tests added

[codecov-commenter]

Codecov Report

Merging #516 (e9f6a16) into master (ece0315) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #516      +/-   ##
==========================================
+ Coverage   93.00%   93.04%   +0.03%     
==========================================
  Files          40       40              
  Lines       14548    14584      +36     
==========================================
+ Hits        13531    13569      +38     
+ Misses       1017     1015       -2     

Impacted Files	Coverage Δ
src/typesystem.rs	96.25% <ø> (+0.34%)	⬆️
src/diagnostics.rs	83.88% <100.00%> (+0.34%)	⬆️
src/validation/stmt_validator.rs	98.20% <100.00%> (+0.07%)	⬆️

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[ghaith]

Looks good!
Thank you