Bump version to 2.2.5

[c72578]

• Substitute occurrences of "2.2.4" with "2.2.5" using: git grep -I -l -e '2\.2\.4' | xargs \ sed -b -i -e 's/2\.2\.4/2\.2\.5/g'
• Update Version in settings file from 224 to 225 sed -b -i -e 's/Version\", 224/Version\", 225/' \ CUETools.Processor/CUEConfig.cs
• Update test file flake.flac sed -b -i -e 's/2\.2\.4/2\.2\.5/g' \ CUETools/CUETools.TestCodecs/Data/flake.flac