Add function to count and find problems with missing tests#96

ignacio-chiazzo merged 2 commits intoignacio-chiazzo:masterignacio-chiazzo/Algorithms-Leetcode-#"/raiman264/Algorithms-Leetcode-Javascript/tree/find-missing-tests" aria-describedby=":Rdsn1d:">raiman264:find-missing-testsraiman264/Algorithms-Leetcode-#"IconButton" type="button" data-loading="false" data-no-visuals="true" data-size="small" data-variant="invisible" aria-describedby=":Rtlsn1d:-loading-announcement" aria-labelledby=":Rlsn1d:">Copy head branch name to clipboard