Changed bool fields to bool pointers to avoid removal by encoder when set to false

[Static-Flow]

Description

Moves bool fields to bool pointers to avoid "omitempty" deleting bool fields set to false. I created a helper method in govultr.go called BooltoBoolPtr for converting a bool value to a pointer of itself.

func BoolToBoolPtr(value bool) *bool {
	b := value
	return &b
}

Related Issues

#114

Checklist:

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you linted your code locally prior to submission?
• Have you successfully ran tests with your changes locally?

[codecov]

Codecov Report

Merging #115 (823a8d4) into master (e2db4bc) will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #115      +/-   ##
==========================================
+ Coverage   49.00%   49.09%   +0.08%     
==========================================
  Files          23       23              
  Lines        1161     1163       +2     
==========================================
+ Hits          569      571       +2     
  Misses        347      347              
  Partials      245      245              

Impacted Files	Coverage Δ
bare_metal_server.go	43.51% <ø> (ø)
block_storage.go	54.16% <ø> (ø)
instance.go	41.12% <ø> (ø)
load_balancer.go	40.57% <ø> (ø)
user.go	52.94% <ø> (ø)
govultr.go	80.23% <100.00%> (+0.47%)	⬆️

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