Bump haml from 4.0.7 to 5.1.2

Gemfile.lock

@@ -30,14 +30,20 @@ GEM
       sass (>= 3.3.0, < 3.5)
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
+    em-websocket (0.5.1)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0.6.0)
     erubis (2.7.0)
+    eventmachine (1.2.7)
     execjs (2.6.0)
     ffi (1.9.10)
-    haml (4.0.7)
+    haml (5.1.2)
+      temple (>= 0.8.0)
       tilt
     hike (1.2.3)
     hooks (0.4.1)
       uber (~> 0.0.14)
+    http_parser.rb (0.6.0)
     i18n (0.7.0)
     json (1.8.3)
     kramdown (1.8.0)
@@ -67,6 +73,11 @@ GEM
       rack (>= 1.4.5, < 2.0)
       thor (>= 0.15.2, < 2.0)
       tilt (~> 1.4.1, < 2.0)
+    middleman-livereload (3.1.1)
+      em-websocket (>= 0.2.0)
+      middleman-core (>= 3.0.2)
+      multi_json (~> 1.0)
+      rack-livereload
     middleman-sprockets (3.4.2)
       middleman-core (>= 3.3)
       sprockets (~> 2.12.1)
@@ -85,6 +96,8 @@ GEM
     padrino-support (0.12.5)
       activesupport (>= 3.1)
     rack (1.6.4)
+    rack-livereload (0.3.17)
+      rack
     rack-test (0.6.3)
       rack (>= 1.0)
     rb-fsevent (0.9.6)
@@ -101,6 +114,7 @@ GEM
     sprockets-sass (1.3.1)
       sprockets (~> 2.0)
       tilt (~> 1.1)
+    temple (0.8.2)
     thor (0.19.1)
     thread_safe (0.3.5)
     tilt (1.4.1)
@@ -117,7 +131,10 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  middleman
+  middleman (~> 3.4.0)
+  middleman-livereload (~> 3.1.0)
+  tzinfo-data
+  wdm (~> 0.1.0)
 
 BUNDLED WITH
    1.10.6