Set ruby version and update all gems.

.ruby-version

@@ -0,0 +1 @@
+3.1.1

Gemfile.lock

@@ -53,8 +53,8 @@ GEM
     ast (2.4.2)
     atomos (0.1.3)
     aws-eventstream (1.2.0)
-    aws-partitions (1.633.0)
-    aws-sdk-core (3.151.0)
+    aws-partitions (1.636.0)
+    aws-sdk-core (3.154.0)
       aws-eventstream (~> 1, >= 1.0.2)
       aws-partitions (~> 1, >= 1.525.0)
       aws-sigv4 (~> 1.1)
@@ -100,7 +100,7 @@ GEM
       unf (>= 0.0.5, < 1.0.0)
     dotenv (2.8.1)
     emoji_regex (3.2.3)
-    excon (0.92.4)
+    excon (0.92.5)
     faraday (1.10.2)
       faraday-em_http (~> 1.0)
       faraday-em_synchrony (~> 1.0)
@@ -136,8 +136,8 @@ GEM
     git (1.12.0)
       addressable (~> 2.8)
       rchardet (~> 1.8)
-    google-apis-androidpublisher_v3 (0.27.0)
-      google-apis-core (>= 0.7.2, < 2.a)
+    google-apis-androidpublisher_v3 (0.28.0)
+      google-apis-core (>= 0.9.0, < 2.a)
     google-apis-core (0.9.0)
       addressable (~> 2.5, >= 2.5.1)
       googleauth (>= 0.16.2, < 2.a)
@@ -147,10 +147,10 @@ GEM
       retriable (>= 2.0, < 4.a)
       rexml
       webrick
-    google-apis-iamcredentials_v1 (0.14.0)
-      google-apis-core (>= 0.7.2, < 2.a)
-    google-apis-playcustomapp_v1 (0.10.0)
-      google-apis-core (>= 0.7, < 2.a)
+    google-apis-iamcredentials_v1 (0.15.0)
+      google-apis-core (>= 0.9.0, < 2.a)
+    google-apis-playcustomapp_v1 (0.11.0)
+      google-apis-core (>= 0.9.0, < 2.a)
     google-apis-storage_v1 (0.17.0)
       google-apis-core (>= 0.7, < 2.a)
     google-cloud-core (1.6.0)
@@ -285,4 +285,4 @@ DEPENDENCIES
   xcov
 
 BUNDLED WITH
-   2.2.33
+   2.3.11