encode entity "greater-than" (>) in text node

[lseguin42]

On browser :
new DOMParser().parseFormString('<div>]]></div>', 'text/xml');
this code throw an error.

we need to encode '>' for fix it.

[reebayroo]

Hey @lseguin42 how do you run the tests? npm test just runs a single one.

[Holzhaus]

I just ran node test/index.js. Anyway, this PR is chaotic beacause there are loads of completely unrelated whitespace changes. IMHO, this should be closed in favour of PR #207, which only escapes > if it was preceded by ]] (in accordance with Section 2.4. of the XML 1.0 spec).

[lviggiani]

Not encoding > to > casues a lot of troubles if the try to format (pretty print) serialised XML text. It would be very helpful to have this pull request merged IMHO