nodejs plugin: update to the latest 6.x LTS point release

[sergiusens]

LP: #1772126
Signed-off-by: Sergio Schvezov sergio.schvezov@canonical.com

• Have you followed the guidelines for contributing?
• Have you signed the CLA?
• If this is a bugfix. Have you checked that there is a bug report open for the issue you are trying to fix on bug reports?
• If this is a new feature. Have you discussed the design on the forum?
• Have you successfully run ./runtests.sh static?
• Have you successfully run ./runtests.sh unit?

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[codecov-io]

Codecov Report

Merging #2157 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2157      +/-   ##
==========================================
+ Coverage   91.32%   91.32%   +<.01%     
==========================================
  Files         193      193              
  Lines       12168    12168              
  Branches     1814     1814              
==========================================
+ Hits        11112    11113       +1     
  Misses        714      714              
+ Partials      342      341       -1

Impacted Files	Coverage Δ
snapcraft/plugins/nodejs.py	93.54% <100%> (ø)	⬆️
snapcraft/internal/elf.py	83.17% <0%> (+0.32%)	⬆️

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[kyrofa]

Looks good to me!