Update technique in pretty print

Browsing your source code I came across this comment. Not sure what was meant, but better update it since April 2019 is gone by. @indexzero

logform/pretty-print.js

Lines 21 to 28 in ec7d624

    
           // Remark (indexzero): update this technique in April 2019 
        
           // when node@6 is EOL 
        
           delete stripped[LEVEL]; 
        
           delete stripped[MESSAGE]; 
        
           delete stripped[SPLAT]; 
        
           info[MESSAGE] = inspect(stripped, false, opts.depth || null, opts.colorize); 
        
           return info;

	// Remark (indexzero): update this technique in April 2019
	// when node@6 is EOL
	delete stripped[LEVEL];
	delete stripped[MESSAGE];
	delete stripped[SPLAT];

	info[MESSAGE] = inspect(stripped, false, opts.depth \|\| null, opts.colorize);
	return info;