Add .xqm to XQuery

lib/linguist/languages.yml

@@ -570,9 +570,10 @@ XML:
   - .rdf
 XQuery:
   :ext:
-  - .xqy
   - .xq
+  - .xqm
   - .xquery
+  - .xqy
 XS:
   :lexer: c
   :ext:

test/test_blob.rb

@@ -224,6 +224,9 @@ class TestBlob < Test::Unit::TestCase
     assert_equal Language['YAML'],  blob(".gemrc").language
 
     assert_equal Language['Text'], blob("README").language
+
+    # https://github.com/xquery/xprocxq/blob/master/src/xquery/util.xqm
+    assert_equal Language['XQuery'], blob("xprocxq.xqm").language
   end
 
   def test_lexer