Update to latest Prism syntax error messages

Author: eregon

spec/ruby/language/pattern_matching_spec.rb

@@ -207,7 +207,7 @@
         in []
         end
       RUBY
-    }.should raise_error(SyntaxError, /syntax error, unexpected `in'|\(eval\):3: syntax error, unexpected keyword_in|cannot parse the expression/)
+    }.should raise_error(SyntaxError, /syntax error, unexpected `in'|\(eval\):3: syntax error, unexpected keyword_in|unexpected 'in'/)
 
     -> {
       eval <<~RUBY
@@ -216,7 +216,7 @@
         when 1 == 1
         end
       RUBY
-    }.should raise_error(SyntaxError, /syntax error, unexpected `when'|\(eval\):3: syntax error, unexpected keyword_when|cannot parse the expression/)
+    }.should raise_error(SyntaxError, /syntax error, unexpected `when'|\(eval\):3: syntax error, unexpected keyword_when|unexpected 'when'/)
   end
 
   it "checks patterns until the first matching" do