Support TS 5.9

Author: jakebailey

.changeset/little-pugs-lick.md

@@ -0,0 +1,6 @@
+---
+"@definitelytyped/typescript-packages": patch
+"@definitelytyped/typescript-versions": patch
+---
+
+Support TS 5.9

packages/typescript-packages/package.json

@@ -30,6 +30,7 @@
     "typescript-5.5": "npm:typescript@~5.5.0-0",
     "typescript-5.6": "npm:typescript@~5.6.0-0",
     "typescript-5.7": "npm:typescript@~5.7.0-0",
-    "typescript-5.8": "npm:typescript@~5.8.0-0"
+    "typescript-5.8": "npm:typescript@~5.8.0-0",
+    "typescript-5.9": "npm:typescript@~5.9.0-0"
   }
 }

packages/typescript-versions/src/index.ts

@@ -43,7 +43,7 @@ export namespace TypeScriptVersion {
   /** Add to this list when a version actually ships.  */
   export const shipped = ["5.0", "5.1", "5.2", "5.3", "5.4", "5.5", "5.6", "5.7"] as const;
   /** Add to this list when a version is available as typescript@next */
-  export const supported = [...shipped, "5.8"] as const;
+  export const supported = [...shipped, "5.8", "5.9"] as const;
   /** Add to this list when it will no longer be supported on Definitely Typed */
   export const unsupported = [
     "2.0",

packages/typescript-versions/test/index.test.ts

@@ -42,7 +42,7 @@ describe("isTypeScriptVersion", () => {
 
 describe("range", () => {
   it("works", () => {
-    expect(TypeScriptVersion.range("5.1")).toEqual(["5.1", "5.2", "5.3", "5.4", "5.5", "5.6", "5.7", "5.8"]);
+    expect(TypeScriptVersion.range("5.1")).toEqual(["5.1", "5.2", "5.3", "5.4", "5.5", "5.6", "5.7", "5.8", "5.9"]);
   });
   it("includes 5.0 onwards", () => {
     expect(TypeScriptVersion.range("5.0")).toEqual(TypeScriptVersion.supported);
@@ -60,6 +60,7 @@ describe("tagsToUpdate", () => {
       "ts5.6",
       "ts5.7",
       "ts5.8",
+      "ts5.9",
       "latest",
     ]);
   });