Bump to 2.1.5

Author: brandon_withrow

.github/issue_template.md

@@ -4,7 +4,7 @@ Hello! Sorry you're having an Issue! Please help us make Lottie better by fillin
 -->
 
 ## Check these before submitting:
-- [] Updated to the latest version of Lottie (2.1.4)
+- [] Updated to the latest version of Lottie (2.1.5)
 - [] The issue doesn't involve an [Unsupported Feature](https://github.com/airbnb/lottie-ios/blob/master/README.md#currently-unsupported-after-effects-features)
 - [] This issue isn't related to another open issue
 

Example/Podfile.lock

@@ -1,5 +1,5 @@
 PODS:
-  - lottie-ios (2.1.4)
+  - lottie-ios (2.1.5)
 
 DEPENDENCIES:
   - lottie-ios (from `../`)
@@ -9,7 +9,7 @@ EXTERNAL SOURCES:
     :path: "../"
 
 SPEC CHECKSUMS:
-  lottie-ios: 94fa2d82547ce3adf1e61157653ba99999fd279f
+  lottie-ios: 836cdbba92f62f3c6a00e37a4ce485321fe317cf
 
 PODFILE CHECKSUM: fdbd59f361db8744871f0e9a0b3f94e0b7b8ca6b
 

Example/Pods/Local Podspecs/lottie-ios.podspec.json

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'lottie-ios'
-  s.version          = '2.1.4'
+  s.version          = '2.1.5'
   s.summary          = 'Used to natively render vector animations exported from After Effects.'
 
   s.description      = <<-DESC

Example/Pods/Manifest.lock

@@ -1,6 +1,6 @@
 {
   "name": "lottie-ios",
-  "version": "2.1.4",
+  "version": "2.1.5",
   "description": "Lottie is a mobile library for Android and iOS that parses Adobe After Effects animations exported as json with bodymovin and renders the vector animations natively on mobile and through React Native!",
   "main": "index.js",
   "scripts": {