configure web server to use TLS 1.2 protocol for ssl_context

[spinits4]

Description

Upgrades tls protocol for web server ssl_context from deprecated TLS v1.0 to TLS v1.2

Status

READY

Type of change

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

How Has This Been Tested?

Created a web server instance using TLS v1.2 which correctly worked in opposition to tls v1.0 which was giving "curl: (35) error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol"

Checklist:

• [/] I have performed a self-review of my own code
• [/] I have made corresponding changes to the documentation (if applicable)
• [/] I have added tests that prove my fix is effective or that my feature works
• [/] New and existing unit tests pass locally with my changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (41246da) 99.16% compared to head (e9223ed) 99.16%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2014   +/-   ##
=======================================
  Coverage   99.16%   99.16%           
=======================================
  Files          83       83           
  Lines        5395     5395           
=======================================
  Hits         5350     5350           
  Misses         45       45           

Files	Coverage Δ
opsdroid/web.py	100.00% <100.00%> (ø)

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[chillipeper]

@jacobtomlinson @FabioRosado any chance this could be looked at?

[jacobtomlinson]

Seems like a good change.