feat: enabling sasjs lint as a git pre-commit hook when contributing …

…to @sasjs/core. To use, just run

> ghooks@2.0.4 install /home/zah/git/core/node_modules/ghooks
> node ./bin/module-install

> @sasjs/core@1.0.0 postinstall /home/zah/git/core
> node-git-hooks

Installing Git hooks...
added 14 packages from 12 contributors and audited 205 packages in 4.23s

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found 0 vulnerabilities from the repository.