Gemfile: Use middleman-blog from gems (#1588)

We can keep up with the changes in gems, now.

Author: olleolleolle

Gemfile

@@ -4,7 +4,7 @@ ruby File.read(File.expand_path("../.ruby-version", __FILE__)).strip
 # Static site generator
 gem "middleman", "~> 4.6"
 ## Extensions
-gem "middleman-blog", github: "middleman/middleman-blog"
+gem "middleman-blog", "~> 4.2"
 gem "middleman-search", github: "tnir/middleman-search", branch: "edge" # https://github.com/manastech/middleman-search/pull/39
 gem "middleman-syntax"
 

Gemfile.lock

@@ -1,12 +1,3 @@
-GIT
-  remote: https://github.com/middleman/middleman-blog.git
-  revision: d232557833df1f417f033900e6daa4dc1725dd2d
-  specs:
-    middleman-blog (4.1.0)
-      addressable (~> 2.3)
-      middleman-core (>= 4.0.0)
-      tzinfo (>= 0.3.0)
-
 GIT
   remote: https://github.com/tnir/middleman-search.git
   revision: 45af9e686469142fb003f58d6cd0ae0ba33cb496
@@ -107,6 +98,10 @@ GEM
     middleman (4.6.2)
       middleman-cli (= 4.6.2)
       middleman-core (= 4.6.2)
+    middleman-blog (4.2.1)
+      addressable (~> 2.3)
+      middleman-core (>= 4.0.0)
+      tzinfo (>= 0.3.0)
     middleman-cli (4.6.2)
       thor (>= 0.17.0, < 2)
     middleman-core (4.6.2)
@@ -260,7 +255,7 @@ DEPENDENCIES
   irb
   kramdown-parser-gfm
   middleman (~> 4.6)
-  middleman-blog!
+  middleman-blog (~> 4.2)
   middleman-search!
   middleman-syntax
   nokogiri (~> 1.18)