Exempi 2.6.2 is out

Exempi 2.6.2 is out.

Here are the changes:

• Update XMPCore to Adobe XMP SDK v2022.06
  • Build system fixes that don’t matter.
• Fix a typo in an ID3 genre string !4
• Build XMP_SDK with some fatal warnings:
  • -Werror=missing-field-initializers
  • -Werror=misleading-indentation
  • -Werror=class-memaccess
• Remove (deprecated) boost_test_minimal #24
• CI: require “bionic” on Travis CI.
• Remove old .sym file (Daniel Kolesa) #17
• Added --enable-samples (default = yes) (Fabrice Fontaine) !6