Add salesforce apex support #2815

Job	Run time
Output Regression Test	9m 46s
Check Linux Packaging	8m 21s
Rustfmt	1m 44s
Test x86_64-unknown-linux-gnu	8m 1s
Test x86_64-apple-darwin	6m 16s
Test Linux (latest stable Rust)	3m 15s
Test with MIME database	8m 19s
Test x86_64-pc-windows-gnu	10m 3s
Test x86_64-unknown-linux-musl	7m 31s
Test aarch64-unknown-linux-gnu	8m 40s
Test aarch64-apple-darwin	10m 46s
	1h 22m 42s

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