test: increase coverage

[sleepdefic1t]

Proposed changes

This PR primarily deals with improving test coverage.

Specifically, this PR does the following:

• removes unnecessary methods in host class.
• uses string instead of char* in Host::ip.
• improves testing of host class.
• improves testing of paths class.
• updates connection test to use string.
• improves testing of host class.
• updates the change log.

Types of changes

• Other... Please describe:

Improves class members and test coverage to 100%.

Checklist

• I have read the CONTRIBUTING documentation
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works

[sleepdefic1t]

@faustbrian
Looks like CircleCI is bugging out again.
This build task isn't in my CircleCI jobs,
and it doesn't look like it appears here either: circleci/ArkEcosystem

Passing tests here:
circleci/sleepdefic1t/cpp-client

100% CodeCov:
codecov/sleepdefic1t/cpp-client

[sleepdefic1t]

gonna try something..

[codecov-io]

Codecov Report

Merging #93 into master will increase coverage by 3.59%.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #93     +/-   ##
=======================================
+ Coverage    96.4%   100%   +3.6%     
=======================================
  Files          14     14             
  Lines         250    245      -5     
=======================================
+ Hits          241    245      +4     
+ Misses          9      0      -9

Impacted Files	Coverage Δ
src/host/host.cpp	100% <100%> (+31.81%)	⬆️
src/api/paths.cpp	100% <0%> (+0.64%)	⬆️
src/http/os/http.cpp	100% <0%> (+2.22%)	⬆️

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