ix various updateNodes/removeNodes issues when the pool and fragments are involved <a href="https://github.com/MithrilJS/mithril.js/issues/1990">#1990</a>, <a href="https://github.com/MithrilJS/mithril.js/issues/1991">#1991</a>, <a href="https://github.com/MithrilJS/mithril.js/issues/2003">#2003</a>, <a href="https://github.com/MithrilJS/mithril.js/pull/2021">#2021</a></li>
<li>render/core: fix crashes when the keyed vnodes with the same <code>key</code> had different <code>tag</code> values <a href="https: