Update to Ruby 2.7.1, update Gemfile.lock.

.ruby-version

@@ -1 +1 @@
-ruby-2.3.1
+ruby-2.7.1

Gemfile.lock

@@ -1,71 +1,86 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (5.0.1)
+    activesupport (6.0.3.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.0)
-      public_suffix (~> 2.0, >= 2.0.2)
+      zeitwerk (~> 2.2, >= 2.2.2)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    aes_key_wrap (1.1.0)
     attr_required (1.0.1)
+    bindata (2.4.8)
     buftok (0.2.0)
-    concurrent-ruby (1.0.4)
-    domain_name (0.5.20161129)
+    concurrent-ruby (1.1.7)
+    domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
     equalizer (0.0.11)
-    faraday (0.10.1)
-      multipart-post (>= 1.2, < 3)
-    fb_graph2 (0.8.0)
+    fb_graph2 (1.2.0)
       activesupport (>= 3.2)
       httpclient (>= 2.4)
       multi_json
       rack-oauth2 (>= 1.1)
       url_safe_base64
-    http (2.1.0)
+    ffi (1.13.1)
+    ffi-compiler (1.0.1)
+      ffi (>= 1.0.0)
+      rake
+    http (4.4.1)
       addressable (~> 2.3)
       http-cookie (~> 1.0)
-      http-form_data (~> 1.0.1)
-      http_parser.rb (~> 0.6.0)
+      http-form_data (~> 2.2)
+      http-parser (~> 1.2.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    http-form_data (1.0.1)
+    http-form_data (2.3.0)
+    http-parser (1.2.1)
+      ffi-compiler (>= 1.0, < 2.0)
     http_parser.rb (0.6.0)
     httpclient (2.8.3)
-    i18n (0.7.0)
+    i18n (1.8.5)
+      concurrent-ruby (~> 1.0)
+    json-jwt (1.13.0)
+      activesupport (>= 4.2)
+      aes_key_wrap
+      bindata
     memoizable (0.4.2)
       thread_safe (~> 0.3, >= 0.3.1)
-    minitest (5.10.1)
-    multi_json (1.12.1)
-    multipart-post (2.0.0)
+    minitest (5.14.2)
+    multi_json (1.15.0)
+    multipart-post (2.1.1)
     naught (1.1.0)
-    public_suffix (2.0.5)
-    rack (2.0.1)
-    rack-oauth2 (1.4.0)
-      activesupport (>= 2.3)
-      attr_required (>= 0.0.5)
-      httpclient (>= 2.4)
-      multi_json (>= 1.3.6)
-      rack (>= 1.1)
+    public_suffix (4.0.6)
+    rack (2.2.3)
+    rack-oauth2 (1.16.0)
+      activesupport
+      attr_required
+      httpclient
+      json-jwt (>= 1.11.0)
+      rack (>= 2.1.0)
+    rake (13.0.1)
     simple_oauth (0.3.1)
-    thread_safe (0.3.5)
-    twitter (6.0.0)
-      addressable (~> 2.5)
+    thread_safe (0.3.6)
+    twitter (7.0.0)
+      addressable (~> 2.3)
       buftok (~> 0.2.0)
-      equalizer (= 0.0.11)
-      faraday (~> 0.10.0)
-      http (~> 2.1)
+      equalizer (~> 0.0.11)
+      http (~> 4.0)
+      http-form_data (~> 2.0)
       http_parser.rb (~> 0.6.0)
-      memoizable (~> 0.4.2)
-      naught (~> 1.1)
-      simple_oauth (~> 0.3.1)
-    tzinfo (1.2.2)
+      memoizable (~> 0.4.0)
+      multipart-post (~> 2.0)
+      naught (~> 1.0)
+      simple_oauth (~> 0.3.0)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.7.2)
+    unf_ext (0.0.7.7)
     url_safe_base64 (0.2.2)
-    yajl-ruby (1.3.0)
+    yajl-ruby (1.4.1)
+    zeitwerk (2.4.0)
 
 PLATFORMS
   ruby
@@ -77,4 +92,4 @@ DEPENDENCIES
   yajl-ruby
 
 BUNDLED WITH
-   1.12.5
+   2.1.4