max buffer is customisable now #43

[shebinleo]

This will be to handle big files like the one mentioned in #43

await pdf2html.meta('sample.pdf', { maxBuffer: 1024 * 10000 }); // set maxBuffer to 10MB
await pdf2html.html('sample.pdf', { maxBuffer: 1024 * 10000 });
await pdf2html.text('sample.pdf', { maxBuffer: 1024 * 10000 });
await pdf2html.pages('sample.pdf', { maxBuffer: 1024 * 10000 });
await pdf2html.thumbnail('sample.pdf', { maxBuffer: 1024 * 10000 });