Allow more SVG text in allowText option

[NightFurySL2001]

SVG defineds 3 text element: text, tspan and textPath. Allows all 3 to be passthrough when allowText = True

[NightFurySL2001]

Fixes #292

[anthrotype]

Can you add a test in tests/svg_test.py maybe using the SVG from the issue report #292 ?
Add it somewhere here, name the file e.g. text-tspan-before.svg and save the expected result next to it, name it text-tspan-nano.svg like the others:

picosvg/tests/svg_test.py

Line 290 in 84c649c

),

[NightFurySL2001]

From what I see in 44192de, the push author used a new function instead of putting it in the mentioned position as picosvg should throw error when allowText = False.

Can @zond help a lil bit here?

[anthrotype]

ok, yes you're right. Add a new test function or parametrize the one for allowText=True, thanks!

[anthrotype]

sorry I pushed the wrong button :)

[NightFurySL2001]

@anthrotype any updates?

[anthrotype]

thanks!