Nextflow fixes

[lvarin]

In this PR there are two fixes:

• Accepts path of files without a file:// prefix.
• It gives support to files with * in its path. Nextflow could declare an output like:

{"url":   "/mnt/d7/bf94bed30fc23584deca82ea83d95a/chunk_*",
 "path": "/work/chunk_*", "type": "FILE"}

[codecov-commenter]

Codecov Report

Merging #19 into master will increase coverage by 0.01%.
The diff coverage is 30.00%.

@@            Coverage Diff             @@
##           master      #19      +/-   ##
==========================================
+ Coverage   27.55%   27.56%   +0.01%     
==========================================
  Files           8        8              
  Lines         606      613       +7     
==========================================
+ Hits          167      169       +2     
- Misses        439      444       +5     

Impacted Files	Coverage Δ
src/tesk_core/filer.py	36.84% <30.00%> (-0.19%)	⬇️

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