feat: show deprecation warning for https/http2 option

[snitin315]

• 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

show deprecation warning for https/http2 option.

Breaking Changes

None

Additional Info

No

[codecov]

Codecov Report

Merging #4003 (6b7e78e) into master (61e572e) will decrease coverage by 0.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4003      +/-   ##
==========================================
- Coverage   92.74%   92.62%   -0.12%     
==========================================
  Files          14       14              
  Lines        1406     1411       +5     
  Branches      516      519       +3     
==========================================
+ Hits         1304     1307       +3     
- Misses         94       96       +2     
  Partials        8        8              

Impacted Files	Coverage Δ
lib/Server.js	94.02% <100.00%> (+0.02%)	⬆️
lib/servers/WebsocketServer.js	91.42% <0.00%> (-5.72%)	⬇️

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[alexander-akait]

We should merge it using feat: because it is deprecation

[alexander-akait]

Can we add example for https/http2 and server options, so we will provide them in our changelog for easy migration?

[snitin315]

Added examples in #4007.

Also, we can link to docs in migration for more information - https://webpack.js.org/configuration/dev-server/#devserverserver