Follow App Store submit rule, upgrade the min Xcode version to Xcode 10.0

.github/ISSUE_TEMPLATE.md

@@ -12,7 +12,7 @@
  Platform Version        | e.g. 12.0 / 10.14.0 / 12.0 / 5.0
  SDWebImage Version      | e.g. 5.0.0 / 4.4.0
  Integration Method      | e.g. carthage / cocoapods / manually
- Xcode Version           | e.g. Xcode 10 / Xcode 9
+ Xcode Version           | e.g. Xcode 11 / Xcode 10
  Repro rate              | e.g. all the time (100%) / sometimes x% / only once
  Repro with our demo prj | e.g. does it happen with our demo project?
  Demo project link       | e.g. link to a demo project that highlights the issue

README.md

@@ -68,7 +68,7 @@ You can use those directly, or create similar components of your own.
 - tvOS 9.0 or later
 - watchOS 2.0 or later
 - macOS 10.10 or later
-- Xcode 9.0 or later
+- Xcode 10.0 or later
 
 #### Backwards compatibility
 

SDWebImage/SDWebImageIndicator.m

@@ -18,7 +18,7 @@
 #if __IPHONE_13_0 || __TVOS_13_0 || __MAC_10_15
 // Xcode 11
 #else
-// Supports Xcode 9 && 10 users, for those users, define these enum
+// Supports Xcode 10 users, for those users, define these enum
 static NSInteger UIActivityIndicatorViewStyleMedium = 100;
 static NSInteger UIActivityIndicatorViewStyleLarge = 101;
 #endif