Restore omniauth 1.9.x and omniauth-github 1.4.0

GitHub sign in is currently broken. This reverts to the dependencies
that previously worked and were auto-upgraded with dependabot, while we
explore properly upgrading.

Gemfile

@@ -31,8 +31,8 @@ gem "mimemagic", "~> 0.3.10"
 gem "neat", "~> 1.9.1"
 gem "nokogiri", ">= 1.6.7.2"
 gem "octokit"
-gem "omniauth"
-gem "omniauth-github"
+gem "omniauth", "~> 1.9.1"
+gem "omniauth-github", "~> 1.4.0"
 gem "paperclip"
 gem "pg"
 gem "pg_search"

Gemfile.lock

@@ -95,6 +95,7 @@ GEM
       aws-sigv4 (~> 1.1)
     aws-sigv4 (1.2.2)
       aws-eventstream (~> 1, >= 1.0.2)
+    base64 (0.2.0)
     bcrypt (3.1.16)
     bootsnap (1.16.0)
       msgpack (~> 1.2)
@@ -226,7 +227,8 @@ GEM
     jquery-ui-rails (6.0.1)
       railties (>= 3.2.16)
     jsonapi-renderer (0.2.2)
-    jwt (2.2.2)
+    jwt (2.8.1)
+      base64
     kaminari (1.2.1)
       activesupport (>= 4.1.0)
       kaminari-actionview (= 1.2.1)
@@ -282,25 +284,25 @@ GEM
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
-    oauth2 (1.4.4)
-      faraday (>= 0.8, < 2.0)
+    oauth2 (2.0.9)
+      faraday (>= 0.17.3, < 3.0)
       jwt (>= 1.0, < 3.0)
-      multi_json (~> 1.3)
       multi_xml (~> 0.5)
-      rack (>= 1.2, < 3)
+      rack (>= 1.2, < 4)
+      snaky_hash (~> 2.0)
+      version_gem (~> 1.1)
     octokit (4.19.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
-    omniauth (2.0.0)
+    omniauth (1.9.2)
       hashie (>= 3.4.6)
       rack (>= 1.6.2, < 3)
-      rack-protection
-    omniauth-github (2.0.1)
-      omniauth (~> 2.0)
-      omniauth-oauth2 (~> 1.8)
-    omniauth-oauth2 (1.8.0)
+    omniauth-github (1.4.0)
+      omniauth (~> 1.5)
+      omniauth-oauth2 (>= 1.4.0, < 2.0)
+    omniauth-oauth2 (1.7.3)
       oauth2 (>= 1.4, < 3)
-      omniauth (~> 2.0)
+      omniauth (>= 1.9, < 3)
     paperclip (6.1.0)
       activemodel (>= 4.2.0)
       activesupport (>= 4.2.0)
@@ -462,6 +464,9 @@ GEM
       rack (~> 2.2)
       rack-protection (= 2.1.0)
       tilt (~> 2.0)
+    snaky_hash (2.0.1)
+      hashie
+      version_gem (~> 1.1, >= 1.1.1)
     spring (2.1.1)
     spring-commands-rspec (1.0.4)
       spring (>= 0.9.1)
@@ -490,6 +495,7 @@ GEM
       i18n
     vanity (3.0.0)
       i18n
+    version_gem (1.1.4)
     webdrivers (4.4.1)
       nokogiri (~> 1.6)
       rubyzip (>= 1.3.0)
@@ -548,8 +554,8 @@ DEPENDENCIES
   neat (~> 1.9.1)
   nokogiri (>= 1.6.7.2)
   octokit
-  omniauth
-  omniauth-github
+  omniauth (~> 1.9.1)
+  omniauth-github (~> 1.4.0)
   paperclip
   pg
   pg_search