Simplify startJVM and support PathLike types for classpath and jvmpath arguments

[pelson]

Closes https://github.com/jpype-project/jpype/issues/529

[codecov[bot]]

Codecov Report

Merging #1062 (05a6d6c) into master (1da1101) will increase coverage by 0.02%. The diff coverage is 93.02%.

@@            Coverage Diff             @@
##           master    #1062      +/-   ##
==========================================
+ Coverage   88.65%   88.68%   +0.02%     
==========================================
  Files         111      111              
  Lines       10211    10215       +4     
  Branches     4016     4016              
==========================================
+ Hits         9053     9059       +6     
+ Misses        699      698       -1     
+ Partials      459      458       -1     

Impacted Files	Coverage Δ
jpype/_core.py	95.61% <92.50%> (+0.05%)	:arrow_up:
jpype/_classpath.py	80.95% <100.00%> (+0.46%)	:arrow_up:
native/common/jp_method.cpp	98.84% <0.00%> (+1.15%)	:arrow_up:

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[pelson]

@marscher & @Thrameos, sorry to bother you both (I appreciate you are both busy!). Just wondering if I can request a re-review of this please? It is one of those changes that touches a few things, and would like to avoid getting unnecessary merge-conflicts. It is also a platform from which I would like to build out a few more typing/code-quality improvements.

[pelson]

Thanks for merging. I'm happy to see this in - it is a small change, but makes life so much more pleasant when you have an IDE and static-analysis at your fingertips. :+1:

[marscher]

My pleasure. Thank you for propelling this into the future. :+1: