net-ldap version update

There is a bug in net-ldap < 0.5.0 preventing connections to Microsoft servers. Pushing the net-ldap dependency version should fix it. See the following net-ldap issue for a description.

https://github.com/ruby-ldap/ruby-net-ldap/issues/80

Gemfile.lock

@@ -2,7 +2,7 @@ PATH
remote: .
specs:
gitlab_omniauth-ldap (1.0.4)
-      net-ldap (~> 0.3.1)
+      net-ldap (~> 0.7.0)
omniauth (~> 1.0)
pyu-ruby-sasl (~> 0.0.3.1)
rubyntlm (~> 0.1.1)
@@ -12,12 +12,12 @@ GEM
specs:
coderay (1.0.8)
diff-lcs (1.1.3)
-    hashie (1.2.0)
+    hashie (3.3.1)
method_source (0.8.1)
-    net-ldap (0.3.1)
-    omniauth (1.1.1)
-      hashie (~> 1.2)
-      rack
+    net-ldap (0.7.0)
+    omniauth (1.2.2)
+      hashie (>= 1.2, < 4)
+      rack (~> 1.0)
pry (0.9.10)
coderay (~> 1.0.5)
method_source (~> 0.8)