Fix and test ConninfoParseError

Author: iamed2

src/connections.jl

@@ -744,7 +744,7 @@ function conninfo(str::AbstractString)
     if err_ref[] != C_NULL
         err_msg = unsafe_string(err_ref[])
         libpq_c.PQfreemem(err_ref[])
-        error(LOGGER, ConninfoParseError(err_msg))
+        error(LOGGER, Errors.ConninfoParseError(err_msg))
     end
 
     ci_array = conninfo(ci_ptr)

test/runtests.jl

@@ -443,6 +443,9 @@ end
             results = columntable(execute(conn, "SELECT '1 12:59:10'::interval;"))
             @test results[1][1] == "@ 1 day 12 hours 59 mins 10 secs"
             close(conn)
+
+            # ERROR: missing "=" after "barf" in connection info string
+            @test_throws LibPQ.Errors.ConninfoParseError LibPQ.conninfo("wrong")
         end
 
         @testset "Time Zone" begin