apkbuild-gem-resolver: use the << operator to append to arrays

apkbuild-gem-resolver.in

@@ -42,7 +42,7 @@ class Aport
       fail if aug.match("/augeas#{apath}//error").length > 0
 
       repos = ['main']
-      repos.push 'testing' if testing
+      repos << 'testing' if testing
       for repo in repos
         for aport in aug.match "#{apath}/#{repo}/*"
           FileAport.new(aug, aport) unless aport.end_with? '/ruby'
@@ -57,7 +57,7 @@ class Aport
         for dep in deps
           aport.add_dependency dep
         end
-        @@subpackages.push aport
+        @@subpackages << aport
       end
     end
 
@@ -88,7 +88,7 @@ class Aport
   end
 
   def add_dependency name
-    @depends.push name
+    @depends << name
   end
 
   attr_reader :gem, :name, :version
@@ -109,7 +109,7 @@ class Aport
   end
 
   def add_user user
-    @users.push user
+    @users << user
   end
 end
 
@@ -143,7 +143,7 @@ class Update
     aport = Aport.get name
     raise 'Invalid package name: ' + name unless aport
     gem = assign(aport.gem, name)
-    @deps.push gem.dependency if gem.require_version version
+    @deps << gem.dependency if gem.require_version version
   end
 
   def resolve
@@ -250,7 +250,7 @@ class Update
         gem = @update.assign(dep.gem, dep.name)
         gem.check_deps
         unless deps.reject! { |sdep| sdep.match? dep.gem, gem.version }
-          @obsolete_deps.push dep.name
+          @obsolete_deps << dep.name
         end
       end