9.0.3: XP 11, PHP 8.2 compatibility

• Made library compatible with XP 11, upgraded xp-framework/logging to
  11.0.0+ and xp-framework/text-encode 10.0.0+
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• Fixed Creation of dynamic property warnings in PHP 8.2 - @thekid
• Fixed Passing null to parameter #2 ($subject) of type string warning
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9.0.2: PHP 8.0.0RC1 compatibility

• Fixed strspn(): Argument #3 ($offset) must be contained... warning
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9.0.1: vsprintf() fix

• Fix "vsprintf(): Argument #2 ($args) must be of type array, string given"
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9.0.0: Drop PHP 5 support

• Implemented xp-framework/rfc#334: Drop PHP 5.6:
  . Heads up: Minimum required PHP version now is PHP 7.0.0
  . Rewrote code base, grouping use statements
  . Rewrote isset(X) ? X : default to X ?? default
  . Converted newinstance to anonymous classes
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8.0.1: Logging compatiblity

• Made compatible with xp-framework/logging version 9.0.0 - @thekid

8.0.0: XP9 Compatibility

• Heads up: Drop PHP 5.5 support - @thekid
• Added forward compatibility with XP 9.0.0 - @thekid

7.3.3: Refactor typeof()

• Refactored code to use typeof() instead of xp::typeOf(), see
  xp-framework/rfc#323
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7.3.2: 8bit encoding fix

• Fixed 8bit encoding constant MIME_ENC_8BIT - @thekid
• Made header parsing for mime parts consistent with message header
  parsing; added a bunch of tests to verify various situations.
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7.3.1: Header parsing fix

• Fixed lang.IndexOutOfBoundsException (Undefined offset: 1) error
  when header line did not contain any value after the colon
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7.3.0: Create and delete folders

• Added newFolder() and removeFolder() methods to CclientStore
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