matchms: added filters and test and fixed linter warnings #1294

Job	Run time
Setup cache and determine changed repositories (3.7)	1m 3s
Lint R scripts (ubuntu-20.04, release)	1m 39s
Lint tool-list (3.7)	1m 26s
Check file sizes	8s
Lint Python scripts (3.7)	10s
Test tools (0, 3.7)	16m 40s
Test tools (1, 3.7)	17m 2s
Test tools (2, 3.7)	7m 13s
Test tools (3, 3.7)	15m 15s
Combine chunked test results (3.7)	45s
Check workflow success	2s
Deploy	0s
Report deploy status	0s
	1h 1m 23s

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