Eliminate dependency on serde's "derive" feature #694
Merged
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This allows serde, and other crates downstream of it like serde_json, to compile in parallel with serde_derive. Without this PR, in any dependency graph that pulls in serde_with, first serde_derive would need to compile, then serde would need to compile, then serde_json would need to compile.
sharkdp/bat#2815 has a diagram of the impact of this change.