Fix #1072

[cspotcode]

Fix#1072
Ripped directly from @evg656e's C-to-JS port of ParseNodeOptionsEnvVar. Thanks!

[codecov]

Codecov Report

Merging #1085 into master will increase coverage by 0.17%.
The diff coverage is 78.78%.

@@ Coverage Diff @@## master #1085 +/- ##
==========================================
+ Coverage 75.32% 75.49% +0.17% 
==========================================
Files 6 7 +1 Lines 624 657 +33 Branches 148 148 ==========================================
+ Hits 470 496 +26 - Misses 100 107 +7 
Partials 54 54 

Flag	Coverage Δ
#node_10	72.15% <ø> (ø)
#node_12_15	72.53% <ø> (ø)
#node_12_16	72.34% <ø> (-0.19%)	⬇️
#node_13	75.19% <78.78%> (+0.19%)	⬆️
#node_14	75.19% <78.78%> (+0.19%)	⬆️
#typescript_2_7	75.03% <78.78%> (+0.19%)	⬆️
#typescript_latest	74.27% <78.78%> (+0.23%)	⬆️
#typescript_next	74.12% <78.78%> (+0.24%)	⬆️
#ubuntu	75.19% <78.78%> (+0.19%)	⬆️
#windows	75.34% <78.78%> (+0.18%)	⬆️

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Impacted Files	Coverage Δ
dist-raw/node-options.js	78.78% <78.78%> (ø)

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[coveralls]

Coverage increased (+0.8%) to 83.175% when pulling c44f76e on ab/1072 into 8dfb75c on master.