feat(stale-and-close): add new options to change the days before close (#224)

* docs(readme): add new options in the documentation

* chore: update the action schema

* chore: parse the new arguments

* feat(stale-and-close): add new options to change the days before close

to avoid a breaking change and simplify the configuration the old options 'daysBeforeStale' and 'daysBeforePrClose' are kept and new options are available to override them with 'daysBeforeIssueStale', 'daysBeforePrStale', 'daysBeforeIssueClose' and 'daysBeforePrClose'

* chore: rename the issue type enum to remove the enum suffix

* chore: add missing dependency for eslint and typescript

also upgrade the parser

* chore: fix an issue with the linter for the shadow rules

it was not configured properly for TypeScript

* chore: use camelCase for constants

* chore: use camelCase for enum members

* chore: fix the tests

* chore: enhance prettier to also lint other kind of files

it was configured to only work with ts and it was not working well to be honest
also now the lint scripts will also run prettier

src/functions/should-mark-when-stale.spec.ts

@@ -0,0 +1,47 @@
+import {shouldMarkWhenStale} from './should-mark-when-stale';
+
+describe('shouldMarkWhenStale()', (): void => {
+  let daysBeforeStale: number;
+
+  describe('when the given number of days indicate that it should be stalled', (): void => {
+    beforeEach((): void => {
+      daysBeforeStale = -1;
+    });
+
+    it('should return false', (): void => {
+      expect.assertions(1);
+
+      const result = shouldMarkWhenStale(daysBeforeStale);
+
+      expect(result).toStrictEqual(false);
+    });
+  });
+
+  describe('when the given number of days indicate that it should be stalled today', (): void => {
+    beforeEach((): void => {
+      daysBeforeStale = 0;
+    });
+
+    it('should return true', (): void => {
+      expect.assertions(1);
+
+      const result = shouldMarkWhenStale(daysBeforeStale);
+
+      expect(result).toStrictEqual(true);
+    });
+  });
+
+  describe('when the given number of days indicate that it should be stalled tomorrow', (): void => {
+    beforeEach((): void => {
+      daysBeforeStale = 1;
+    });
+
+    it('should return true', (): void => {
+      expect.assertions(1);
+
+      const result = shouldMarkWhenStale(daysBeforeStale);
+
+      expect(result).toStrictEqual(true);
+    });
+  });
+});