Bump `simplecov` #1121

Job	Run time
Coding Style \| 3.0	33s
Specs \| 2.7	39s
Prism	24s
Specs \| 3.0	22s
Main Gem Specs \| RuboCop: master \| 2.7	2m 0s
Specs \| 3.1	23s
Specs \| 3.2	29s
Main Gem Specs \| RuboCop: master \| 3.0	1m 46s
Specs \| 3.3	34s
Main Gem Specs \| RuboCop: v1.61.0 \| 3.3	1m 51s
Specs \| head	24s
Coverage \| 2.7	39s
Specs "modern" \| 3.0	34s
Specs \| jruby	41s
Specs \| truffleruby	52s
Specs \| truffleruby-head	59s
	13m 10s

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