New npm release

[tuckergordon]

Would it be possible to publish the latest version(s) to npm? The latest version on npm currently is 0.2.0, but there have been updates made to this repository since then. It would be nice to be able to rely on npm for the latest version, rather than building manually.

[jxn-30]

As there has been a bugfix merged today, I would like to remind of this.
As far as I see, there are the following changes since the last release, 9 years ago:

• fix errors on redraw if map does not exist anymore (204e20b, d2871b3)
• support ILayer's 'pane' property with Leafletjs 1.0 (a7f07cb)
• Add getBounds() function to heatmap layer (b3c181b)
• update simpleheat to 0.4.0 (8474cac)