* fix(parser): fix issue with escaping backslashes when enableEscapeTags is set (#20)
there is a bug in the lexer where when enableEscapeTags is set, backslashes
are not always escaped (ie. \\[b] is treated as an escaped tag, rather than a
literal backslash, and then a tag).
* chore: v2.5.1
* feat(parse): allow tags to be escaped with backslash
adds additional option `enableEscapeTags` to `parse` and `createLexer` that
when true will parse openTag and closeTag as WORD (rather than TAG) when
proceeded with backslash
— all operations on nodes moved to `createList` function
- fixed problem with single tags with value only like `[url=value]` fixes#6
- write tests for `Token` class
- moved all node arrays to parse func, now parser supports many instances
- add jsdoc to critical parts of the parser to better understanding how it works
Nikolay Kostyurin