Support for optional attributes on all tags.

Changes:

• Fix: Support for optional attributes on tags.
• The API remains fully backward-compatible.

Note: Caution if your HTML source is using tags with attributes.

Details:
Previously, tags other than <a> that contained attributes were not converted correctly. For example, <li class="menu-item"> was treated as inline text rather than a list item on a new line. Similarly, other tags with attributes (such as <h[1-6]> or <p>) were converted as inline text instead of being followed by a newline.

Option WithKeepSpaces to keep spaces as they are

Changes:

• another fully-backward-compatible update
• a new WithKeepSpaces option added to preserve spaces as they are (prevents the default behavior where multiple consecutive space characters are collapsed into a single standard space character)

Improved <a> tag handling & optional <li> list formatting

Changes:

• another fully-backward-compatible update
• tag is now case-insensitive and follows official specs, see #16
• added optional WithListSupport and WithListSupportPrefix to make <li></li> lines formatted with a prefix like " - "

v1.1.0

• same as v1.0.9, just signaling the fact that the new functionality has been added
• fully-backward-compatible update (with any past version)
• functional options (line breaks style and tag inner text preservation)

  HTML2TextWithOptions(`click <a href="http://bit.ly/2n4wXRs">news</a>`, WithLinksInnerText())
  // produces: click news <http://bit.ly/2n4wXRs>

v1.0.9

• fully-backward-compatible update
• functional options (line breaks style and tag inner text preservation)

  HTML2TextWithOptions(`click <a href="http://bit.ly/2n4wXRs">news</a>`, WithLinksInnerText())
  // produces: click news <http://bit.ly/2n4wXRs>

v1.0.7

Fix tag pattern to support custom tags starting with 'a' character like <attribute>test</attribute> and return inner content test.

v1.0.6

fix: allow # in link URLs and prevent unnecessary space, fixes #11

1.0.5

Fix to prevent lower-casing "href" attribute of tags

1.0.4

Configurable line break style (backward-compatible CrLf is default) and numerical html entities, both contributed by @merlincox.