Fix SVG support.

[twavv]

Fixes #226.

[shashi]

OK to squash and merge 👍

[codecov-io]

Codecov Report

Merging #231 into master will increase coverage by 4.58%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #231      +/-   ##
==========================================
+ Coverage   49.52%   54.11%   +4.58%     
==========================================
  Files          14       14              
  Lines         523      523              
==========================================
+ Hits          259      283      +24     
+ Misses        264      240      -24

Impacted Files	Coverage Δ
src/connection.jl	62.5% <0%> (+4.16%)	⬆️
src/syntax.jl	68.75% <0%> (+6.25%)	⬆️
src/scope.jl	66.98% <0%> (+9.43%)	⬆️
src/imports.jl	43.47% <0%> (+19.56%)	⬆️

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