[ios] Bump version to 2.15.4

Author: tsapeta

exponent-view-template/ios/exponent-view-template/Supporting/Info.plist

@@ -17,7 +17,7 @@
 	<key>CFBundleShortVersionString</key>
 	<string>1.0</string>
 	<key>CFBundleVersion</key>
-	<string>2.15.3</string>
+	<string>2.15.4</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>NSAppTransportSecurity</key>

ios/Exponent/Supporting/Info.plist

@@ -17,7 +17,7 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.15.3</string>
+	<string>2.15.4</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleURLTypes</key>
@@ -54,7 +54,7 @@
 		</dict>
 	</array>
 	<key>CFBundleVersion</key>
-	<string>2.15.3</string>
+	<string>2.15.4</string>
 	<key>Fabric</key>
 	<dict>
 		<key>APIKey</key>