Tdewolff-minify

- cmd: require `--bundle` for concatenation when the input is a directory, see 348
- CSS: improve performance on background positions (from OSS-Fuzz)
- HTML: don't trim whitespace on all attribute values (in `value` and `placeholder` it's significant), see 351
- HTML: keep value on `translate=no`, see 352
- HTML: support SSI tags, see 353
- HTML: add option `KeepComments` to keep all comments, see 366
- JS: fix endless loop in certain if-else combinations; minify more or/and/conditional expressions that start with a group (from OSS-Fuzz)
- JS: fix import/export with one item, fixes 354
- JS: escape `</script>` in strings, fixes 355
- JS: keep parens in arrow functions for BindingArray and BindingObject, fixes 358
- JS: enclose entire expression in parenthesis if it starts with an object literal, fixes 359
- JS: prevent slowdown for if-else with if in body (from OSS-Fuzz)
- JS: fix errors messages that contain % symbols
- JS: put limits to the number of levels in statements and in expressions (from OSS-Fuzz)
- JS: fix declarations with the same name as in the for initializer, see https://github.com/tdewolff/parse/issues/69
- JS: fix var declarations not adding their usage in all the scopes between its block scope and the function scope
- SVG: keep `width` and `height` attributes on `<svg>`, fixes 367
- XML: keep ampersand and less-than escaped, see 362

- JS: put variable declarations after `"use strict"`, fixes 343
- JS: don't convert hexadecimal representations in strings from `0x80` upwards unless it's UTF-8, fixes 341
- JS: don't merge var declarations after for statement into for initializer, fixes 346
- JS: add parenthesis when necessary to if condition when converting to conditional expression, fixes 347

- Improve error contexts when the file contains unicode characters
- HTML: revert change in v2.9.5 that removed spaces between attributes, fixes 342
- JS: fix bug that converted `(function(){})()` to `!function(){}()` which modifies the return value, fixes 340

- Fix `1e-10` which was invalidly converted to `.e-9` (this only applied to `1e-10`, `1e-100`, etc and not to other numbers such as `1e-11` or `1e-9`), fixes 339
- JS: remove the use of the nullish operator `??` which is not supported by IE, Android+Firefox, and Android+Opera, fixes 338
- JS: fix bug in merging var declarations, where partial merges resulted in duplicate assignments

- cmd: add JS options
- JS: remove unassigned bindings in for statement initializer when it cannot be merged with variable declaration
- JS: use `Precision` option in minifying numbers
- SVG: fix bugs in skipping `foreignObject` tags

- JS: add var decl as undeclared in block scopes between the current scope and the function scope, fixes 334
- JS: fix overwriting next statement in if-else => if-if conversion, fixes 335