updating junos shell patterns, see scrapligo #46

[carlmontanari]

updates junos shell/root shell patterns based on pr in scrapligo from @nitinsoniism

[codecov]

Codecov Report

Merging #170 (d218c18) into develop (2f4d78a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #170   +/-   ##
========================================
  Coverage    91.16%   91.16%           
========================================
  Files           58       58           
  Lines         3258     3258           
========================================
  Hits          2970     2970           
  Misses         288      288           

Impacted Files	Coverage Δ
scrapli/driver/core/juniper_junos/base_driver.py	100.00% <ø> (ø)

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