Improve code readability by using concepts where appropriate (#556) #395

Job	Run time
windows-msvc-shared (AVRO)	6m 47s
windows-msvc-shared (JSON)	10m 18s
windows-msvc-shared (CBOR)	9m 18s
windows-msvc-shared (MSGPACK)	3m 49s
windows-msvc-shared (FLEXBUFFERS)	5m 30s
windows-msvc-shared (XML)	4m 11s
windows-msvc-shared (YAML)	4m 22s
windows-msvc-shared (PARQUET)	38m 25s
windows-msvc-shared (CAPNPROTO)	8m 35s
windows-msvc-shared (TOML)	3m 59s
windows-msvc-shared (UBJSON)	7m 1s
windows-msvc (JSON)	10m 39s
windows-msvc (CAPNPROTO)	8m 8s
windows-msvc (MSGPACK)	9m 16s
windows-msvc (PARQUET)	41m 0s
windows-msvc (TOML)	3m 54s
windows-msvc (XML)	4m 39s
windows-msvc (YAML)	4m 47s
windows-msvc (AVRO)	7m 35s
windows-msvc (CBOR)	7m 42s
windows-msvc (FLEXBUFFERS)	5m 24s
windows-msvc (UBJSON)	6m 59s
windows-msvc (benchmarks)	47m 44s
	4h 20m 2s

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