chore: update string-utils and XCode settings version

cli.xcodeproj/xcshareddata/xcschemes/cli-test.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1230"
+   LastUpgradeVersion = "1240"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

cli.xcodeproj/xcshareddata/xcschemes/cli.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1230"
+   LastUpgradeVersion = "1240"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

external/string-utils

@@ -1 +1 @@
-Subproject commit 6908eff3248a9ae007482b0d9a739d6d25cd585c
+Subproject commit db456dac7f214b13b48d6953720509972b8e72e0