Add scripts to increment version number

Author: subdan

Scripts/increment_major_version.command

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+cd "$( dirname "${BASH_SOURCE[0]}" )"
+cd ..
+perl -i -pe 's/\b(\d+)(?=.\d+")/$1+1/e' FigmaExport.podspec
+perl -i -pe 's/\b(\d+)(?=.\d+")/$1+1/e' ./Sources/FigmaExport/Subcommands/VersionOptions.swift

Scripts/increment_minor_version.command

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+cd "$( dirname "${BASH_SOURCE[0]}" )"
+cd ..
+perl -i -pe 's/\b(\d+)(?=\D*$)/$1+1/e' FigmaExport.podspec
+perl -i -pe 's/\b(\d+)(?=\D*$)/$1+1/e' ./Sources/FigmaExport/Subcommands/VersionOptions.swift