chore: Updating to AdjustSignature 3.20.0 + small alignments

Adjust.podspec

@@ -15,20 +15,20 @@ Pod::Spec.new do |s|
   s.default_subspec         = 'Adjust'
   s.module_map              = 'ModuleMap/module.modulemap'
 
-  s.subspec 'Adjust' do |ads|
-    ads.source_files = 'Adjust/**/*.{h,m}'
-    ads.public_header_files = 'Adjust/*.h', 'UmbrellaHeaders/sdk/*.h'
-    ads.resource_bundle = {'Adjust' => ['Adjust/*.xcprivacy']}
-    ads.header_dir = 'AdjustSdk'
-    ads.dependency 'AdjustSignature', '3.18'
+  s.subspec 'Adjust' do |adj|
+    adj.source_files = 'Adjust/**/*.{h,m}'
+    adj.public_header_files = 'Adjust/*.h', 'UmbrellaHeaders/sdk/*.h'
+    adj.resource_bundle = {'Adjust' => ['Adjust/*.xcprivacy']}
+    adj.header_dir = 'AdjustSdk'
+    adj.dependency 'AdjustSignature', '~> 3.18'
   end
 
-  s.subspec 'AdjustWebBridge' do |wb|
-    wb.source_files = 'Adjust/**/*.{h,m}', 'AdjustBridge/*.{h,m}', 'UmbrellaHeaders/webbridge/*.{h,m}'
-    wb.public_header_files = 'Adjust/*.h', 'AdjustBridge/*.h', 'UmbrellaHeaders/webbridge/*.h'
-    wb.resource_bundle = {'Adjust' => ['Adjust/*.xcprivacy']}
-    wb.header_dir = 'AdjustSdk'
-    wb.dependency 'AdjustSignature', '3.18'
-    wb.ios.deployment_target = '12.0'
+  s.subspec 'AdjustWebBridge' do |awb|
+    awb.source_files = 'Adjust/**/*.{h,m}', 'AdjustBridge/*.{h,m}', 'UmbrellaHeaders/webbridge/*.{h,m}'
+    awb.public_header_files = 'Adjust/*.h', 'AdjustBridge/*.h', 'UmbrellaHeaders/webbridge/*.h'
+    awb.resource_bundle = {'Adjust' => ['Adjust/*.xcprivacy']}
+    awb.header_dir = 'AdjustSdk'
+    awb.dependency 'AdjustSignature', '~> 3.18'
+    awb.ios.deployment_target = '12.0'
   end
 end