Return an https URL when option `bind_tls` is enabled

[alfozan]

Description Fix bug reported in https://github.com/alexdlaird/pyngrok/issues/62

Issues https://github.com/alexdlaird/pyngrok/issues/62

Test plan:

from pyngrok import ngrok
print(ngrok.connect(port="5000", proto="http", options={"bind_tls": True}))

output: https://X.ngrok.io prefix is https as expected

other use cases are not affected:

from pyngrok import ngrok
print(ngrok.connect(port="5000", proto="http"))

output: http://X.ngrok.io

from pyngrok import ngrok
print(ngrok.connect(port="5000", proto="http", options={"bind_tls": False}))

output: http://X.ngrok.io

All outputs are as expected

Environment:

PYNGROK VERSION: 4.1.9
NGROK VERSION: 2.3.35

Tested on: https://colab.research.google.com/

Type of Change

• [x] Bug fix (non-breaking change which fixes an issue)

Checklist

• [x] My code follows the PEP 8 style guidelines for Python
• [x] I have performed a self-review of my own code
• [x] I have commented my code in particularly hard-to-understand areas
• [x] If applicable, I have made corresponding changes to the documentation
• [x] I have added tests that prove my change is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] My changes generate no new warnings

[codecov[bot]]

Codecov Report

Merging #63 into master will decrease coverage by 1.22%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #63      +/-   ##
==========================================
- Coverage   95.51%   94.29%   -1.23%     
==========================================
  Files           5        5              
  Lines         491      491              
==========================================
- Hits          469      463       -6     
- Misses         22       28       +6     

Impacted Files	Coverage Δ
pyngrok/ngrok.py	92.91% <100.00%> (-0.79%)	:arrow_down:
pyngrok/process.py	92.34% <0.00%> (-2.56%)	:arrow_down:

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[alexdlaird]

Trying to remember if there was a reason I specifically didn't do this ... can't think of anything at present.

Could you add a unit test to assert the public_url is properly asserted as https? There should be similar ones you can base it off of. Thanks!