Make VEXExprConverter more resilient (#181) #301

Job	Run time
docs	18s
macos / Test macOS	15s
ci / Build	7m 34s
windows / Test Windows	22s
ci / Lint	1m 9s
ci / Test (0)	7m 53s
ci / Test (1)	8m 34s
ci / Test (2)	12m 3s
ci / Test (3)	3m 55s
ci / Test (4)	5m 17s
ci / Test (5)	4m 41s
ci / Test (6)	5m 47s
ci / Test (7)	7m 27s
ci / Test (8)	7m 42s
ci / Test (9)	9m 26s
ci / Publish Unit Tests Results	1s
	1h 22m 24s

Provide feedback