Fix error when there is rule keyword

[jimmyko]

This PR is to fix below error when the feature file contains statement with Rule keyword

/Users/jimmyko/github/gherkin-lint/dist/rules/keywords-in-logical-order.js:17
    node.steps.forEach(step => {
         ^

TypeError: Cannot read properties of null (reading 'steps')
    at /Users/jimmyko/github/gherkin-lint/dist/rules/keywords-in-logical-order.js:17:10
    at Array.forEach (<anonymous>)
    at Object.run (/Users/jimmyko/github/gherkin-lint/dist/rules/keywords-in-logical-order.js:13:20)
    at /Users/jimmyko/github/gherkin-lint/dist/rules.js:46:26
    at Array.forEach (<anonymous>)
    at Object.runAllEnabledRules (/Users/jimmyko/github/gherkin-lint/dist/rules.js:41:22)
    at readAndParseFile.then.perFileErrors (/Users/jimmyko/github/gherkin-lint/dist/linter.js:74:29)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Promise.all (index 0)

[jimmyko]

@vsiakka please kindly review this PR. This will fix the bug which is the only blocker for me using this in the project I'm working

[andrewnicols]

Hi @jimmyko,

Can you please rebase this change and provide a unit test.

[gesysver]

Hi there! Just bumped into this issue myself. Hope this PR to be merged soon :)