ParsingException doesn't allow pointing to the last character

[mega12345mega]

In ParsingException, the int column variable is 1-indexed. However, it checks if column < context.length() rather than <=, which means pointing to the last character in the context is not possible:

Configurate/core/src/main/java/org/spongepowered/configurate/loader/ParsingException.java

Lines 177 to 187 in 033bdf8

	message.append(System.lineSeparator()).append(this.context);
	if (this.column >= 0 && this.column < this.context.length()) {
	message.append(System.lineSeparator());
	if (this.column > 0) {
	final char[] spaces = new char[this.column - 1];
	Arrays.fill(spaces, ' ');
	message.append(spaces);
	}
	message.append(POSITION_MARKER);
	}

It is also not clear to me why it allows column to equal 0 (and renders it as if column equals 1), but this isn't as big of a concern.