Allow using the modifier on SVG and `math` elements (#235) #623

Job	Run time
Tests	54s
Floating Dependencies	42s
ember-lts-3.28	51s
ember-lts-4.4	44s
ember-lts-4.8	1m 5s
ember-lts-4.12	50s
ember-lts-5.4	50s
ember-release	46s
ember-beta	52s
ember-canary	1m 1s
no-deprecations	54s
ember-release-no-deprecations	1m 2s
embroider-safe	50s
embroider-optimized	53s
ember-modifier-3.2.7	48s
	13m 2s

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