Output node min version variable

[kdumontnu]

Simply output the MIN_NODE_VERSION we are checking against in the error output.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@d85a4e8). Click here to learn what that means.
The diff coverage is 55.93%.

@@            Coverage Diff            @@
##             master   #15562   +/-   ##
=========================================
  Coverage          ?   43.80%           
=========================================
  Files             ?      678           
  Lines             ?    81730           
  Branches          ?        0           
=========================================
  Hits              ?    35802           
  Misses            ?    40090           
  Partials          ?     5838           

Impacted Files	Coverage Δ
modules/notification/mail/mail.go	33.67% <0.00%> (ø)
modules/setting/markup.go	1.58% <0.00%> (ø)
routers/org/home.go	61.00% <0.00%> (ø)
routers/repo/compare.go	40.93% <0.00%> (ø)
routers/repo/lfs.go	0.00% <0.00%> (ø)
routers/repo/milestone.go	0.00% <0.00%> (ø)
routers/user/profile.go	42.17% <0.00%> (ø)
modules/markup/external/external.go	2.00% <5.00%> (ø)
modules/markup/csv/csv.go	36.23% <22.22%> (ø)
routers/repo/release.go	23.19% <28.57%> (ø)
... and 20 more

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