fix for v0.8.0 and type piracy

[sbromberger]

Yarrrrr!

                 uuuuuuu
             uu$$$$$$$$$$$uu
          uu$$$$$$$$$$$$$$$$$uu
         u$$$$$$$$$$$$$$$$$$$$$u
        u$$$$$$$$$$$$$$$$$$$$$$$u
       u$$$$$$$$$$$$$$$$$$$$$$$$$u
       u$$$$$$$$$$$$$$$$$$$$$$$$$u
       u$$$$$$"   "$$$"   "$$$$$$u
       "$$$$"      u$u       $$$$"
        $$$u       u$u       u$$$
        $$$u      u$$$u      u$$$
         "$$$$uu$$$   $$$uu$$$$"
          "$$$$$$$"   "$$$$$$$"
            u$$$$$$$u$$$$$$$u
             u$"$"$"$"$"$"$u
  uuu        $$u$ $ $ $ $u$$       uuu
 u$$$$        $$$$$u$u$u$$$       u$$$$
  $$$$$uu      "$$$$$$$$$"     uu$$$$$$
u$$$$$$$$$$$uu    """""    uuuu$$$$$$$$$$
$$$$"""$$$$$$$$$$uuu   uu$$$$$$$$$"""$$$"
 """      ""$$$$$$$$$$$uu ""$"""
           uuuu ""$$$$$$$$$$uuu
  u$$$uuu$$$$$$$$$uu ""$$$$$$$$$$$uuu$$$
  $$$$$$$$$$""""           ""$$$$$$$$$$$"
   "$$$$$"                      ""$$$$""
     $$$"                         $$$$"

addresses https://github.com/JuliaGraphs/LightGraphs.jl/pull/541#discussion_r11…0540312

[codecov]

Codecov Report

Merging #581 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #581   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          60     60           
  Lines        2990   2990           
=====================================
  Hits         2990   2990

---

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[codecov]

Codecov Report

Merging #581 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #581   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          60     60           
  Lines        2990   2990           
=====================================
  Hits         2990   2990

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ff49e0c...2d997e1. Read the comment docs.

[sbromberger]

This is an emergency fix since it's holding up v0.8.0 - @jpfairbanks, if you're around this morning, please review - otherwise I'll go ahead and merge.