Update cheatsheets

mocha

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mocha
+
+> A feature-rich JavaScript test framework.
+> More information: <https://mochajs.org>.
+
+- Run tests with default configuration or as configured in `mocha.opts`:
+
+`mocha`
+
+- Run tests contained at a specific location:
+
+`mocha {{directory/with/tests}}`
+
+- Run tests that match a specific `grep` pattern:
+
+`mocha --grep {{regular_expression}}`
+
+- Run tests on changes to JavaScript files in the current directory and once initially:
+
+`mocha --watch`
+
+- Run tests with a specific reporter:
+
+`mocha --reporter {{reporter}}`