update sinatra and removed backports

Charlie thinks we have a memory leak due to the linear growth of the GC total allocated objects graph

Author: joshk

Gemfile

@@ -8,7 +8,7 @@ gem 'travis-config',  '~> 1.0.0'
 gem 'sidekiq',         '~> 4.0.0'
 gem 'redis-namespace'
 
-gem 'sinatra',         '~> 1.4.2'
+gem 'sinatra',         '~> 2.0.0'
 gem 'rake',            '~> 0.9.2.2'
 
 gem 'sentry-raven'
@@ -18,9 +18,6 @@ gem 'activesupport',   '~> 4.1.11'
 gem 'metriks'
 gem 'metriks-librato_metrics'
 
-# backports 2.5.0 breaks rails routes
-gem 'backports',       '2.4.0'
-
 # structures
 gem 'yajl-ruby',       '~> 1.4.0'
 

Gemfile.lock

@@ -23,7 +23,6 @@ GEM
     atomic (1.1.99)
     avl_tree (1.2.1)
       atomic (~> 1.1)
-    backports (2.4.0)
     coderay (1.1.2)
     concurrent-ruby (1.0.5)
     connection_pool (2.2.1)
@@ -47,11 +46,12 @@ GEM
       metriks (>= 0.9.9.6)
     minitest (5.11.3)
     multipart-post (2.0.0)
+    mustermann (1.0.2)
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (1.6.10)
-    rack-protection (1.5.5)
+    rack (2.0.5)
+    rack-protection (2.0.1)
       rack
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
@@ -74,10 +74,11 @@ GEM
       concurrent-ruby (~> 1.0)
       connection_pool (~> 2.2, >= 2.2.0)
       redis (~> 3.2, >= 3.2.1)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
+    sinatra (2.0.1)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.1)
+      tilt (~> 2.0)
     thor (0.20.0)
     thread_safe (0.3.6)
     tilt (2.0.8)
@@ -96,7 +97,6 @@ PLATFORMS
 
 DEPENDENCIES
   activesupport (~> 4.1.11)
-  backports (= 2.4.0)
   foreman (~> 0.41.0)
   jemalloc!
   metriks
@@ -108,7 +108,7 @@ DEPENDENCIES
   rspec (~> 2.9)
   sentry-raven
   sidekiq (~> 4.0.0)
-  sinatra (~> 1.4.2)
+  sinatra (~> 2.0.0)
   travis-config (~> 1.0.0)
   travis-support!
   unicorn (~> 4.6.2)