Bug 1600855 - Re-enable letter-spacing and word-spacing on SVG text. r=longsonr

Differential Revision: https://phabricator.services.mozilla.com/D55601

--HG--
extra : moz-landing-system : lando

modules/libpref/init/StaticPrefList.yaml

@@ -7523,7 +7523,7 @@
 # Is support for letter-spacing and word-spacing in SVG text enabled?
 - name: svg.text-spacing.enabled
   type: bool
-  value: false
+  value: true
   mirror: always
 
 #---------------------------------------------------------------------------