Ignore JS-style comments during parse

[marvinhagemeister]

This PR enhances htm's parser to detect and ignore JS-style comments, similar to JSX.

// Multi line
html`<div
    /* I'm ignored */
    id="foo" />`

// Single line
html`<div
  // I'm ignored
  id="foo" />`

Fixes #213

[github-actions[bot]]

Size Change: +248 B (+3%)

Total Size: 8.38 kB

Filename	Size	Change
./dist/htm.js	729 B	+51 B (+8%)	🔍
./dist/htm.mjs	696 B	+50 B (+8%)	🔍
./mini/index.js	577 B	+49 B (+9%)	🔍
./mini/index.mjs	533 B	+50 B (+10%)	⚠️
./preact/standalone.mjs	5.35 kB	+48 B (+1%)

ℹ️ View Unchanged

| Filename | Size | | :--- | :---: | | `./preact/index.js` | 145 B | | `./preact/index.mjs` | 117 B | | `./react/index.js` | 128 B | | `./react/index.mjs` | 99 B |

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