Added DynamicEnumerable Async extension methods

[StefH]

Also cleanup some old projects

[codecov]

Codecov Report

Merging #99 into master will decrease coverage by 0.84%.
The diff coverage is 15%.

@@            Coverage Diff            @@
##           master     #99      +/-   ##
=========================================
- Coverage   84.34%   83.5%   -0.85%     
=========================================
  Files          26      27       +1     
  Lines        3181    3213      +32     
  Branches      475     475              
=========================================
  Hits         2683    2683              
- Misses        366     398      +32     
  Partials      132     132

Impacted Files	Coverage Δ
...q.Dynamic.Core/DynamicEnumerableAsyncExtensions.cs	0% <0%> (ø)
...em.Linq.Dynamic.Core/DynamicQueryableExtensions.cs	98.17% <100%> (ø)	⬆️
...m.Linq.Dynamic.Core/DynamicEnumerableExtensions.cs	100% <100%> (ø)	⬆️
...rkCore.DynamicLinq/EFDynamicQueryableExtensions.cs	65.94% <33.33%> (ø)	⬆️

---

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[codecov]

Codecov Report

Merging #99 into master will decrease coverage by 1.08%.
The diff coverage is 15%.

@@            Coverage Diff             @@
##           master      #99      +/-   ##
==========================================
- Coverage   84.34%   83.25%   -1.09%     
==========================================
  Files          26       27       +1     
  Lines        3181     3213      +32     
  Branches      475      475              
==========================================
- Hits         2683     2675       -8     
- Misses        366      398      +32     
- Partials      132      140       +8

Impacted Files	Coverage Δ
...q.Dynamic.Core/DynamicEnumerableAsyncExtensions.cs	0% <0%> (ø)
...m.Linq.Dynamic.Core/DynamicEnumerableExtensions.cs	100% <100%> (ø)	⬆️
...em.Linq.Dynamic.Core/DynamicQueryableExtensions.cs	98.17% <100%> (ø)	⬆️
...rkCore.DynamicLinq/EFDynamicQueryableExtensions.cs	65.94% <33.33%> (ø)	⬆️
...c/System.Linq.Dynamic.Core/Tokenizer/TextParser.cs	97.23% <0%> (-1.39%)	⬇️
src/System.Linq.Dynamic.Core/ExpressionParser.cs	82.43% <0%> (-0.32%)	⬇️
...rc/System.Linq.Dynamic.Core/DynamicClassFactory.cs	90.36% <0%> (+0.45%)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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