fix(compiler): Validate decorated properties

[pmdartus]

Details

This PR fixes a bug in the babel-plugin-transform-lwc-class where decorators applied to class fields where not validated the same way than class methods.

Fixes #100

Does this PR introduce a breaking change?

• Yes
• No

[salesforce-best-lwc-internal]

Benchmark comparison

Base commit: 9a57344 | Target commit: 5cbe9f2

benchmark	base(9a57344)	target(5cbe9f2)	trend
table-append-1k.benchmark:benchmark-table/append/1k	250.74 (± 4.78 ms)	250.71 (± 7.57 ms)	👌
table-clear-1k.benchmark:benchmark-table/clear/1k	12.94 (± 0.61 ms)	13.26 (± 0.58 ms)	👌
table-create-10k.benchmark:benchmark-table/create/10k	1373.61 (± 11.19 ms)	1391.38 (± 12.18 ms)	👎
table-create-1k.benchmark:benchmark-table/create/1k	141.81 (± 3.05 ms)	150.00 (± 2.60 ms)	👎
table-update-10th-1k.benchmark:benchmark-table/update-10th/1k	143.01 (± 2.77 ms)	140.25 (± 1.66 ms)	👍
tablecmp-append-1k.benchmark:benchmark-table-component/append/1k	320.67 (± 9.22 ms)	315.57 (± 7.11 ms)	👍
tablecmp-clear-1k.benchmark:benchmark-table/clear/1k	30.69 (± 1.08 ms)	30.95 (± 1.06 ms)	👌
tablecmp-create-10k.benchmark:benchmark-table-component/create/10k	1980.69 (± 24.34 ms)	2079.30 (± 62.79 ms)	👎
tablecmp-create-1k.benchmark:benchmark-table-component/create/1k	227.68 (± 6.53 ms)	227.04 (± 3.96 ms)	👌
tablecmp-update-10th-1k.benchmark:benchmark-table-component/update-10th/1k	134.20 (± 2.27 ms)	137.38 (± 4.07 ms)	👎