Do not truncate after switch-statement with removed case

[lukastaegert]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:
Resolves #3236

Description

When switch cases were removed, the logic to determine if ALL switch cases contained a return ignored the removed cases. This is fixed now.

[codecov]

Codecov Report

Merging #3241 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3241      +/-   ##
==========================================
+ Coverage   91.26%   91.27%   +<.01%     
==========================================
  Files         170      170              
  Lines        5922     5923       +1     
  Branches     1794     1794              
==========================================
+ Hits         5405     5406       +1     
  Misses        311      311              
  Partials      206      206

Impacted Files	Coverage Δ
src/ast/nodes/SwitchStatement.ts	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3885a7f...004f800. Read the comment docs.