r2 dependency update

Author: aferditamuriqi

Cartfile

@@ -7,6 +7,6 @@ github "krzyzanowskim/CryptoSwift" == 1.2.0
 github "cezheng/Fuzi" == 3.1.1
 github "dexman/Minizip" == 1.4.0
 github "readium/r2-shared-swift" == 1.4.2
-github "readium/r2-streamer-swift" == 1.2.3
+github "readium/r2-streamer-swift" == 1.2.4
 github "readium/r2-navigator-swift" == 1.2.5
 github "readium/readium-opds-swift" == 1.2.2

Cartfile.resolved

@@ -6,7 +6,7 @@ github "krzyzanowskim/CryptoSwift" "1.2.0"
 github "onevcat/Kingfisher" "5.9.0"
 github "readium/r2-navigator-swift" "1.2.5"
 github "readium/r2-shared-swift" "1.4.2"
-github "readium/r2-streamer-swift" "1.2.3"
+github "readium/r2-streamer-swift" "1.2.4"
 github "readium/readium-opds-swift" "1.2.2"
 github "stephencelis/SQLite.swift" "0.12.2"
 github "weichsel/ZIPFoundation" "0.9.9"