BREAKING CHANGES: change disableHostCheck and allowedHosts to firewall option

[knagaitsev]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

Yes

Motivation / Use-Case

disableHostCheck and allowedHosts options should be merged into a single firewall option

Breaking Changes

• disableHostCheck and allowedHosts removed in favor of firewall

Additional Info

[codecov]

Codecov Report

Merging #2715 into v4 will decrease coverage by 0.04%.
The diff coverage is 92.30%.

@@            Coverage Diff             @@
##               v4    #2715      +/-   ##
==========================================
- Coverage   92.89%   92.85%   -0.05%     
==========================================
  Files          37       37              
  Lines        1295     1301       +6     
  Branches      345      348       +3     
==========================================
+ Hits         1203     1208       +5     
- Misses         88       89       +1     
  Partials        4        4              

Impacted Files	Coverage Δ
lib/utils/createConfig.js	94.44% <87.50%> (-1.15%)	⬇️
lib/Server.js	96.33% <100.00%> (ø)
lib/utils/normalizeOptions.js	100.00% <100.00%> (ø)

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[alexander-akait]

/cc @hiroppy

Good job!

[hiroppy]

Need to resolve conflicts.

[alexander-akait]

/cc @Loonride

[alexander-akait]

Feel free to merge when CI was green