fix: CMake package and imported library target names #410

Job	Run time
windows-msvc-shared (CAPNPROTO)	8m 1s
windows-msvc-shared (JSON)	9m 57s
windows-msvc-shared (MSGPACK)	3m 55s
windows-msvc-shared (CBOR)	8m 25s
windows-msvc-shared (AVRO)	7m 29s
windows-msvc-shared (XML)	4m 19s
windows-msvc-shared (TOML)	4m 22s
windows-msvc-shared (PARQUET)	38m 44s
windows-msvc-shared (YAML)	3m 55s
windows-msvc-shared (UBJSON)	7m 2s
windows-msvc-shared (FLEXBUFFERS)	5m 50s
windows-msvc (TOML)	3m 43s
windows-msvc (JSON)	10m 31s
windows-msvc (XML)	4m 12s
windows-msvc (UBJSON)	7m 20s
windows-msvc (MSGPACK)	3m 43s
windows-msvc (AVRO)	7m 0s
windows-msvc (CBOR)	8m 37s
windows-msvc (CAPNPROTO)	7m 47s
windows-msvc (YAML)	4m 9s
windows-msvc (PARQUET)	20m 50s
windows-msvc (FLEXBUFFERS)	5m 34s
windows-msvc (benchmarks)	24m 51s
	3h 30m 16s

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