PSR-3 versioning compatibility table

	A	B	C	D	E	F
1		PSR interfaces	Actual	Adds ONLY return type	Adds ONLY arguments type	Final version (adds both types, new PSR?)
2	Monolog implementations		log($level, $message, array $context = []);	log($level, $message, array $context = []): void;	log(string $level, string $message, array $context = []);	log(string $level, string $message, array $context = []): void;
3	V1	log($level, $message, array $context = []);	-	Broken	Ok with PHP >= 7.2	Broken
4	V2	log($level, $message, array $context = []): void;	ok	-	Ok with PHP >= 7.2	Ok with PHP >= 7.2
5	V3?	log(string $level, string $message, array $context = []);	Broken	Broken	-	Broken
6	Final	log(string $level, string $message, array $context = []): void;	Broken	Broken	Ok	-
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