Update iOS deployment target to silence Xcode 15 warnings (#1589)

Summary:
## Changes in this pull request

Xcode 15 has moved the iOS deployment target up to iOS 12 (just like #1573 for Xcode 14). I did not modify the changelog because there's already an entry there for iOS 11 and macOS 10.13.

This also includes a build error fix for IGWarnAssert (dffcd4d). I tried running the unit tests but a number of them are failing from previous changes.

### Checklist

- [ ] All tests pass. Demo project builds and runs.
- [x] I added tests, an experiment, or detailed why my change isn't tested.
- [ ] I added an entry to the `CHANGELOG.md` for any breaking changes, enhancements, or bug fixes.
- [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/main/.github/CONTRIBUTING.md)

Pull Request resolved: #1589

Reviewed By: fabiomassimo

Differential Revision: D50013207

Pulled By: TimOliver

fbshipit-source-id: 6c7a7b2ca3dd1265f11e85979432eded3292ed06

IGListKit.xcodeproj/project.pbxproj

@@ -376,6 +376,7 @@
 		88144F1D1D870EDC007C7F66 /* IGTestSupplementarySource.m in Sources */ = {isa = PBXBuildFile; fileRef = 88144F061D870EDC007C7F66 /* IGTestSupplementarySource.m */; };
 		882BC1321E0118CB0083B311 /* IGTestObject.m in Sources */ = {isa = PBXBuildFile; fileRef = 88144F001D870EDC007C7F66 /* IGTestObject.m */; };
 		883797082022304E00B94676 /* (null) in Headers */ = {isa = PBXBuildFile; };
+		883797082022304E00B94676 /* BuildFile in Headers */ = {isa = PBXBuildFile; };
 		88379728202236AB00B94676 /* IGListAdapterUpdateTester.m in Sources */ = {isa = PBXBuildFile; fileRef = 294CDE621F995DD7002CF6E4 /* IGListAdapterUpdateTester.m */; };
 		88379729202236AC00B94676 /* IGListAdapterUpdateTester.m in Sources */ = {isa = PBXBuildFile; fileRef = 294CDE621F995DD7002CF6E4 /* IGListAdapterUpdateTester.m */; };
 		885FE1DD1DC51A0D009CE2B4 /* IGListKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 885FE1D41DC51A0D009CE2B4 /* IGListKit.framework */; };
@@ -440,7 +441,6 @@
 		F1ED68B329E9B3B9003744F8 /* IGListInteractiveMovingTests.m in Sources */ = {isa = PBXBuildFile; fileRef = F1ED68AE29E9B3B9003744F8 /* IGListInteractiveMovingTests.m */; };
 		F1ED68B529E9B3B9003744F8 /* IGListDebugDescriptionTests.m in Sources */ = {isa = PBXBuildFile; fileRef = F1ED68AF29E9B3B9003744F8 /* IGListDebugDescriptionTests.m */; };
 		F1ED68B729E9B3B9003744F8 /* IGListTransactionTests.m in Sources */ = {isa = PBXBuildFile; fileRef = F1ED68B029E9B3B9003744F8 /* IGListTransactionTests.m */; };
-		F1ED68B929E9B3B9003744F8 /* IGListSingleSectionControllerTests.m in Sources */ = {isa = PBXBuildFile; fileRef = F1ED68B129E9B3B9003744F8 /* IGListSingleSectionControllerTests.m */; };
 		F1ED68BA29E9B404003744F8 /* IGListInteractiveMovingTests.m in Sources */ = {isa = PBXBuildFile; fileRef = F1ED68AE29E9B3B9003744F8 /* IGListInteractiveMovingTests.m */; };
 		F1ED68BB29E9B40A003744F8 /* IGListGenericSectionControllerTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 29DA5CA21EA7C72400113926 /* IGListGenericSectionControllerTests.m */; };
 		F1ED68BC29E9B411003744F8 /* IGListDebuggerTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 290DF3761E9323E6009FE456 /* IGListDebuggerTests.m */; };
@@ -1441,6 +1441,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				883797082022304E00B94676 /* (null) in Headers */,
+				883797082022304E00B94676 /* BuildFile in Headers */,
 				7A02D0C023615CE500B49FAE /* IGListKit.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -1968,7 +1969,6 @@
 				298DD9CF1E3ADD1400F76F50 /* IGListBindingSectionControllerTests.m in Sources */,
 				885FE22F1DC51B76009CE2B4 /* IGListDiffSwiftTests.swift in Sources */,
 				885FE23F1DC51B86009CE2B4 /* IGTestObject.m in Sources */,
-				F1ED68B929E9B3B9003744F8 /* IGListSingleSectionControllerTests.m in Sources */,
 				F1855A4D29BC565600558D18 /* IGListDiffDescriptionStringTests.m in Sources */,
 				828540511DE40D2D00118B94 /* IGListTestAdapterHorizontalDataSource.m in Sources */,
 				885FE2371DC51B76009CE2B4 /* IGListWorkingRangeHandlerTests.m in Sources */,
@@ -2670,7 +2670,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -2681,7 +2681,7 @@
 				);
 				SDKROOT = iphoneos;
 				TARGETED_DEVICE_FAMILY = "1,2";
-				TVOS_DEPLOYMENT_TARGET = 11.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -2733,7 +2733,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				OTHER_CFLAGS = "-fmodules";
@@ -2745,7 +2745,7 @@
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				TARGETED_DEVICE_FAMILY = "1,2";
-				TVOS_DEPLOYMENT_TARGET = 11.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";

IGListKit.xcodeproj/xcshareddata/xcschemes/IGListKit-macOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0940"
+   LastUpgradeVersion = "1500"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

IGListKit.xcodeproj/xcshareddata/xcschemes/IGListKit-tvOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0940"
+   LastUpgradeVersion = "1500"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

IGListKit.xcodeproj/xcshareddata/xcschemes/IGListKit.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0940"
+   LastUpgradeVersion = "1500"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"