sslutil: use proper attribute to select python 3.7+
The previous attribute was python 3.6+, but guarded a python 3.7+ block.
Using the correct attribute avoids:
File "/usr/lib64/python3.6/site-packages/mercurial/sslutil.py", line 334, in wrapsocket
sslcontext.minimum_version = ssl.TLSVersion.TLSv1_1
AttributeError: module 'ssl' has no attribute 'TLSVersion'
{
// Enforcing
"eqeqeq" : true, // true: Require triple equals (===) for comparison
"forin" : true, // true: Require filtering for..in loops with obj.hasOwnProperty()
"freeze" : true, // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
"nonbsp" : true, // true: Prohibit "non-breaking whitespace" characters.
"undef" : true, // true: Require all non-global variables to be declared (prevents global leaks)
// Environments
"browser" : true // Web Browser (window, document, etc)
}