add roslyn 4.11 as target · riok/mapperly@059762c

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Performance alert! Previous value was 120741.05671574519 and current value is 2129211.23140625. It is 17.63452539941694x worse than previous exceeding a ratio threshold 3

Performance alert! Previous value was 1277208.939174107 and current value is 46730573.96103896. It is 36.58804172734398x worse than previous exceeding a ratio threshold 3