Raise code coverage for Dsn to 100%

[philipphofmann]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

The code coverage for Dns is raised to 100% with this PR.

💡 Motivation and Context

It is better to have a higher code coverage to be able to change code later. Furthermore, one TODO is removed.

💚 How did you test it?

With unit tests.

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• All tests passing

🔮 Next steps

None.

[marandaneto]

@philipphofmann thanks, one TODO less.
keep it up.

[codecov-io]

Codecov Report

Merging #212 into master will increase coverage by 0.11%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #212      +/-   ##
============================================
+ Coverage     58.46%   58.58%   +0.11%     
- Complexity      561      564       +3     
============================================
  Files            73       73              
  Lines          2634     2634              
  Branches        231      231              
============================================
+ Hits           1540     1543       +3     
+ Misses          978      975       -3     
  Partials        116      116

Impacted Files	Coverage Δ	Complexity Δ
sentry-core/src/main/java/io/sentry/core/Dsn.java	94.11% <100%> (+8.82%)	12 <0> (+3)	⬆️

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