feat: add support for named primitive types

[yassinebenaid]

This PR adds support for named primitive types.

Before now:

...

type X string

v := X("foo")

godump.Dump(v)

godump.Dump("bar")

would result in:

"foo"
"Bar"

Now :

pkg.X("foo")

"Bar"

This change comes after me having a hard time while using this library in a project in which we have large data-structures with named primitives.

[codecov]

Codecov Report

Attention: Patch coverage is 90.47619% with 2 lines in your changes missing coverage. Please review.

Project coverage is 97.87%. Comparing base (3378832) to head (1bd0468).

Files	Patch %	Lines
dumper.go	90.47%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #67      +/-   ##
==========================================
- Coverage   98.87%   97.87%   -1.00%     
==========================================
  Files           1        1              
  Lines         177      188      +11     
==========================================
+ Hits          175      184       +9     
- Misses          2        3       +1     
- Partials        0        1       +1     

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[ccoVeille]

Also please fix typo: primitive not pimitive

In the commit message and the PR title