FIX: Bump to later release of svgutils, small API change

[mgxd]

Originally discussed in #595 (comment)

Sets the minimum version of svgutils to 1.3.4 to avoid try/except shenanigans.

[effigies]

Thanks. Consider this also a +1 for an immediate patch release.

[codecov]

Codecov Report

Merging #619 (50ee8a5) into maint/1.3.x (4d9b741) will not change coverage.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##           maint/1.3.x     #619   +/-   ##
============================================
  Coverage        46.94%   46.94%           
============================================
  Files               43       43           
  Lines             5287     5287           
  Branches           770      770           
============================================
  Hits              2482     2482           
  Misses            2721     2721           
  Partials            84       84           

Flag	Coverage Δ
documentation	0.00% <0.00%> (ø)
reportlettests	100.00% <ø> (ø)
unittests	47.14% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
niworkflows/viz/utils.py	9.52% <0.00%> (ø)

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[mgxd]

Comparing reports, there's a size discrepancy on some reports:

testFAST_nosegments.svg this patch

testFAST_nosegments.svg master

[mgxd]

Closing this to avoid altering LTS images. Patch will be applied for next minor series.