chore: migrate eslint to flat config

eslint 9 ignores .eslintrc.* by default, so replace .eslintrc.cjs with a
flat eslint.config.mjs (in the style of graycoreio/daffodil)

supported-version/src/kind/get-currently-supported.ts

@@ -4,10 +4,10 @@ import { getIndividualVersionsForProject } from "../versions/get-versions-for-pr
 export const getCurrentlySupportedVersions = (project: string, date: Date): string[] => {
     const allVersions = getIndividualVersionsForProject(project)
     return Object.entries(<Record<string,PackageMatrixVersion>>allVersions)
-        .filter(([key, value]) => {
+        .filter(([, value]) => {
             const dayOfRelease = new Date(value.release);
             dayOfRelease.setSeconds(dayOfRelease.getSeconds() + 1);
             return date >= dayOfRelease && new Date(value.eol) >= date;
         })
-        .map(([key, value]) => key);
+        .map(([key]) => key);
 }

supported-version/src/kind/get-usable.ts

@@ -42,5 +42,5 @@ export const getUsableVersions = (project: string): string[] => {
 
             return true;
         })
-        .map(([key, value]) => key);
+        .map(([key]) => key);
 }

supported-version/src/kind/recent.ts

@@ -15,7 +15,7 @@ export const getRecentVersions = (project: string, date: Date, durationStr: stri
 
     const allVersions = getIndividualVersionsForProject(project)
     return Object.entries(<Record<string,PackageMatrixVersion>>allVersions)
-        .filter(([key, value]) => {
+        .filter(([, value]) => {
             const dayOfRelease = new Date(value.release);
             dayOfRelease.setSeconds(dayOfRelease.getSeconds() + 1);
             const dateAfterRelease = new Date(value.release);
@@ -27,5 +27,5 @@ export const getRecentVersions = (project: string, date: Date, durationStr: stri
 
             return date >= dayOfRelease && date <= dateAfterRelease;
         })
-        .map(([key, value]) => key);
+        .map(([key]) => key);
 }

supported-version/src/nightly/get-next-version.ts

@@ -3,7 +3,7 @@ import { Repository } from "./repository";
 /**
  * Get the next version of Magento, as determined by the repository.
  */
-export const getNextVersion = (repository: Repository, date: Date) => {
+export const getNextVersion = (repository: Repository, _date: Date) => {
     switch(repository){
         case "https://nightly.mage-os.org":
         case "https://upstream-nightly.mage-os.org":

supported-version/src/nightly/repository.ts

@@ -1,4 +1,4 @@
-const KNOWN_REPOSITORIES = {
+export const KNOWN_REPOSITORIES = {
     "https://repo.mage-os.org": true,
     "https://nightly.mage-os.org": true,
     "https://upstream-mirror.mage-os.org": true,

supported-version/src/versions/get-versions-for-project.ts

@@ -1,16 +1,22 @@
 import { validateProject } from "../project/validate-projects";
 import { PackageMatrixVersion } from "../matrix/matrix-type";
+import mageOsIndividual from './mage-os/individual.json';
+import mageOsMinimalIndividual from './mage-os-minimal/individual.json';
+import magentoOpenSourceIndividual from './magento-open-source/individual.json';
+import mageOsComposite from './mage-os/composite.json';
+import mageOsMinimalComposite from './mage-os-minimal/composite.json';
+import magentoOpenSourceComposite from './magento-open-source/composite.json';
 
-const individual = {
-    'mage-os': require('./mage-os/individual.json'),
-    'mage-os-minimal': require('./mage-os-minimal/individual.json'),
-    'magento-open-source': require('./magento-open-source/individual.json')
+const individual = <Record<string, Record<string, PackageMatrixVersion>>><unknown>{
+    'mage-os': mageOsIndividual,
+    'mage-os-minimal': mageOsMinimalIndividual,
+    'magento-open-source': magentoOpenSourceIndividual
 }
 
-const composite = {
-    'mage-os': require('./mage-os/composite.json'),
-    'mage-os-minimal': require('./mage-os-minimal/composite.json'),
-    'magento-open-source': require('./magento-open-source/composite.json')
+const composite = <Record<string, Record<string, PackageMatrixVersion>>><unknown>{
+    'mage-os': mageOsComposite,
+    'mage-os-minimal': mageOsMinimalComposite,
+    'magento-open-source': magentoOpenSourceComposite
 }
 
 export const getIndividualVersionsForProject = (project: string): Record<string, PackageMatrixVersion> => {
@@ -20,7 +26,7 @@ export const getIndividualVersionsForProject = (project: string): Record<string,
             `Project "${project}" has no individual version specifications`
         )
     }
-    
+
     return individual[project]
 }
 
@@ -33,4 +39,4 @@ export const getCompositeVersionsForProject = (project: string): Record<string,
     }
 
     return composite[project]
-}
+}