Updated dependencies.

eslint-config

package-lock.json

package.json

trees/package-lock.json

trees/package.json

trees/src/enumeration.test.js

trees/src/insertion.test.js

trees/src/membership.test.js

trees/src/multipleInsertion.test.js

trees/src/removal.test.js

trees/src/testing/failFast.js