Update dependency twitter to v8

Gemfile.lock

@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.2)
     bond (0.5.1)
     buftok (0.2.0)
@@ -28,9 +28,9 @@ GEM
       unf (>= 0.0.5, < 1.0.0)
     equalizer (0.0.11)
     execjs (2.7.0)
-    ffi (1.15.0)
-    ffi-compiler (1.0.1)
-      ffi (>= 1.0.0)
+    ffi (1.16.3)
+    ffi-compiler (1.3.2)
+      ffi (>= 1.15.5)
       rake
     foreman (0.87.2)
     hike (1.2.3)
@@ -39,7 +39,7 @@ GEM
       http-cookie (~> 1.0)
       http-form_data (~> 2.2)
       http-parser (~> 1.2.0)
-    http-cookie (1.0.3)
+    http-cookie (1.0.5)
       domain_name (~> 0.5)
     http-form_data (2.3.0)
     http-parser (1.2.3)
@@ -54,13 +54,13 @@ GEM
       thread_safe (~> 0.3, >= 0.3.1)
     msgpack (1.4.2)
     multi_json (1.15.0)
-    multipart-post (2.1.1)
+    multipart-post (2.4.0)
     naught (1.1.0)
     nio4r (2.5.7)
     parallel (1.20.1)
     parser (3.0.0.0)
       ast (~> 2.4.1)
-    public_suffix (4.0.6)
+    public_suffix (5.0.5)
     puma (5.2.2)
       nio4r (~> 2.0)
     rack (1.6.13)
@@ -146,7 +146,7 @@ GEM
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.7.7)
+    unf_ext (0.0.9.1)
     unicode-display_width (2.0.0)
 
 PLATFORMS