Fix missing source in Jupyter notebook/lab

[ChrisAichinger]

Profiling in Jupyter Notebooks or Jupyter Lab with recent ipykernel
versions (>= 6), resulted in the following error message:

Could not find file /tmp/ipykernel_8298/3242911465.py
Are you sure you are running this program from the same
directory that you ran the profiler from?
Continuing without the function's contents.

The timing output then does not include source code lines.

The problem is that line_profiler tries to determine when it runs in
side IPython/Jupyter using a simple heuristic based on the reported
filename. New ipykernel versions changed this filename pattern and broke
our test.

As a quick fix, amend the test so it continues working. Longer term, a
more robust solution would be desirable.

Fixes #86

[codecov]

Codecov Report

Merging #93 (e7e1abb) into master (d4836b7) will increase coverage by 0.09%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master      #93      +/-   ##
==========================================
+ Coverage   52.74%   52.84%   +0.09%     
==========================================
  Files           5        5              
  Lines         419      422       +3     
  Branches       60       60              
==========================================
+ Hits          221      223       +2     
- Misses        178      179       +1     
  Partials       20       20              

Impacted Files	Coverage Δ
line_profiler/line_profiler.py	42.42% <50.00%> (+0.27%)	⬆️

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