Bump default gems

- aasm (5.0.0 → 5.0.1)
- pg (1.1.2 → 1.1.3)
- skylight (2.0.2 → 3.0.0)
- uglifier (4.1.18 → 4.1.19)

Gemfile.lock

@@ -19,7 +19,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     CFPropertyList (2.3.6)
-    aasm (5.0.0)
+    aasm (5.0.1)
       concurrent-ruby (~> 1.0)
     actioncable (5.2.1)
       actionpack (= 5.2.1)
@@ -538,7 +538,7 @@ GEM
     parser (2.5.1.2)
       ast (~> 2.4.0)
     pdf-core (0.7.0)
-    pg (1.1.2)
+    pg (1.1.3)
     powerpack (0.1.2)
     prawn (2.2.2)
       pdf-core (~> 0.7.0)
@@ -720,9 +720,9 @@ GEM
       rack (~> 2.0)
       rack-protection (= 2.0.3)
       tilt (~> 2.0)
-    skylight (2.0.2)
-      skylight-core (= 2.0.2)
-    skylight-core (2.0.2)
+    skylight (3.0.0)
+      skylight-core (= 3.0.0)
+    skylight-core (3.0.0)
       activesupport (>= 4.2.0)
     smart_listing (1.2.2)
       coffee-rails
@@ -766,7 +766,7 @@ GEM
       ethon (>= 0.9.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.18)
+    uglifier (4.1.19)
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext