Missing generate version script

Author: VladislavFitz

generate_version.sh

@@ -0,0 +1,7 @@
+version_number=`sed -n '/MARKETING_VERSION/{s/MARKETING_VERSION = //;s/;//;s/^[[:space:]]*//;p;q;}' ./AlgoliaSearch.xcodeproj/project.pbxproj`
+version_file=Sources/AlgoliaSearch-Client/Version.swift
+> $version_file
+echo "// This is generated file. Don't modify it manually." >> $version_file
+echo "public struct Version {" >> $version_file
+echo "  public static let current = \""${version_number}"\"" >> $version_file
+echo "}" >> $version_file