fix decoding of the sql DECIMAL type: integers and floats are now han… #1764

Job	Run time
compile_and_lint	4m 20s
test (mssql, mssql, mssql://root:[email protected]/sqlpage)	2m 46s
test (odbc, postgres, Driver={PostgreSQL Unicode};Server=127.0.0.1;Port=5432;Database=sqlpage;UID...	3m 1s
test (postgres, postgres, postgres://root:[email protected]/sqlpage)	2m 45s
docker_build (linux/amd64)	8m 55s
windows_test	6m 22s
test (mysql, mysql, mysql://root:[email protected]/sqlpage)	2m 23s
docker_build (linux/arm64)	9m 13s
docker_build (linux/arm/v7)	8m 57s
docker_push	20s
	49m 2s

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