Issue found #8

i was trying to execute this command
convertio -f svg Screenshot\ from\ 2023-08-12\ 20-08-24.png

And got this error
`PHP Fatal error: Uncaught Error: Non-static method ConvertioCLI\Info::printSystemMessage() cannot be called statically in phar:///usr/local/bin/convertio/src/Info.php:22
Stack trace:
#0 phar:///usr/local/bin/convertio/cli.php(30): ConvertioCLI\Info::printError()
#1 /usr/local/bin/convertio(10): include('...')
#2 {main}
thrown in phar:///usr/local/bin/convertio/src/Info.php on line 22

`