Fix setting width greater than the default

[krzema12]

Resolves #152.

It looks like a coding error when porting snakeyaml-engine to Kotlin. The original project contains:

snakeyaml-engine-kmp/src/main/java/org/snakeyaml/engine/v2/emitter/Emitter.java

Lines 213 to 216 in 04614c7

	this.bestWidth = 80;
	if (opts.getWidth() > this.bestIndent * 2) {
	this.bestWidth = opts.getWidth();
	}

which I'm reimplementing in this PR.

BTW, there's no unit test for this behavior in snakeyaml-engine, and ideally we'd like to add it there as well. It would have prevented this regression.

[aSemy]

👍