Handle namespaces that reexport themselves

[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 #3071

Description

This turned out to be a really small fix. Basically I separated the namespace creation from its initialisation so that during initialisation, a namespace is already able to reference itself. With this fix, this:
https://rollupjs.org/repl/?version=1.19.4&shareable=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

becomes this:

const foo = 1;

console.log(foo);

I also changed form tests to throw an error when an unexpected warning is encountered and fixed the resulting errors. This should very much reduce test noise and improve the tests.

[codecov]

Codecov Report

Merging #3077 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3077      +/-   ##
==========================================
+ Coverage   88.81%   88.81%   +<.01%     
==========================================
  Files         165      165              
  Lines        5729     5731       +2     
  Branches     1743     1743              
==========================================
+ Hits         5088     5090       +2     
  Misses        388      388              
  Partials      253      253

Impacted Files	Coverage Δ
src/ast/variables/NamespaceVariable.ts	100% <100%> (ø)	⬆️
src/Module.ts	94.23% <100%> (+0.03%)	⬆️

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