bump typescript to 4.5

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/clever-olives-shake.md

@@ -0,0 +1,40 @@
+---
+'@backstage/cli': minor
+---
+
+Removed the `typescript` dependency from the Backstage CLI in order to decouple the TypeScript version in Backstage projects. To keep using a specific TypeScript version, be sure to add an explicit dependency in your root `package.json`:
+
+```json
+  "dependencies": {
+    ...
+    "typescript": "~4.5.4",
+  }
+```
+
+We recommend using a `~` version range since TypeScript releases do not adhere to semver.
+
+It may be the case that you end up with errors if upgrade the TypeScript version. This is because there was a change to TypeScript not long ago that defaulted the type of errors caught in `catch` blocks to `unknown`. You can work around this by adding `"useUnknownInCatchVariables": false` to the `"compilerOptions"` in your `tsconfig.json`:
+
+```json
+  "compilerOptions": {
+    ...
+    "useUnknownInCatchVariables": false
+  }
+```
+
+Another option is to use the utilities from `@backstage/errors` to assert the type of errors caught in `catch` blocks:
+
+```ts
+import { assertError, isError } from '@backstage/errors';
+
+try {
+  ...
+} catch (error) {
+  assertError(error);
+  ...
+  // OR
+  if (isError(error)) {
+    ...
+  }
+}
+```

.changeset/stupid-baboons-hug.md

@@ -0,0 +1,42 @@
+---
+'@backstage/create-app': patch
+---
+
+The app template has been updated to add an explicit dependency on `typescript` in the root `package.json`. This is because it was removed as a dependency of `@backstage/cli` in order to decouple the TypeScript versioning in Backstage projects.
+
+To apply this change in an existing app, add a `typescript` dependency to your `package.json` in the project root:
+
+```json
+  "dependencies": {
+    ...
+    "typescript": "~4.5.4",
+  }
+```
+
+We recommend using a `~` version range since TypeScript releases do not adhere to semver.
+
+It may be the case that you end up with errors if upgrade the TypeScript version. This is because there was a change to TypeScript not long ago that defaulted the type of errors caught in `catch` blocks to `unknown`. You can work around this by adding `"useUnknownInCatchVariables": false` to the `"compilerOptions"` in your `tsconfig.json`:
+
+```json
+  "compilerOptions": {
+    ...
+    "useUnknownInCatchVariables": false
+  }
+```
+
+Another option is to use the utilities from `@backstage/errors` to assert the type of errors caught in `catch` blocks:
+
+```ts
+import { assertError, isError } from '@backstage/errors';
+
+try {
+  ...
+} catch (error) {
+  assertError(error);
+  ...
+  // OR
+  if (isError(error)) {
+    ...
+  }
+}
+```

package.json

@@ -79,7 +79,7 @@
     "prettier": "^2.2.1",
     "shx": "^0.3.2",
     "ts-node": "^10.4.0",
-    "typescript": "~4.3.5",
+    "typescript": "~4.5.4",
     "yarn-lock-check": "^1.0.5"
   },
   "prettier": "@spotify/prettier-config",

packages/cli/package.json

@@ -105,7 +105,6 @@
     "sucrase": "^3.20.2",
     "tar": "^6.1.2",
     "terser-webpack-plugin": "^5.1.3",
-    "typescript": "^4.0.3",
     "util": "^0.12.3",
     "webpack": "^5.48.0",
     "webpack-dev-server": "4.3.1",

packages/create-app/templates/default-app/package.json.hbs

@@ -34,7 +34,8 @@
     "@spotify/prettier-config": "^12.0.0",
     "concurrently": "^6.0.0",
     "lerna": "^4.0.0",
-    "prettier": "^2.3.2"
+    "prettier": "^2.3.2",
+    "typescript": "~4.5.4"
   },
   "prettier": "@spotify/prettier-config",
   "lint-staged": {

tsconfig.json

@@ -8,6 +8,7 @@
   ],
   "compilerOptions": {
     "outDir": "dist-types",
-    "rootDir": "."
+    "rootDir": ".",
+    "useUnknownInCatchVariables": false
   }
 }

yarn.lock

@@ -27648,21 +27648,16 @@ typescript-json-schema@^0.52.0:
     typescript "~4.4.4"
     yargs "^17.1.1"
 
-typescript@^4.0.3, typescript@~4.5.2:
-  version "4.5.4"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-4.5.4.tgz#a17d3a0263bf5c8723b9c52f43c5084edf13c2e8"
-  integrity sha512-VgYs2A2QIRuGphtzFV7aQJduJ2gyfTljngLzjpfW9FoYZF6xuw1W0vW9ghCKLfcWrCFxK81CSGRAvS1pn4fIUg==
-
-typescript@~4.3.5:
-  version "4.3.5"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
-  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==
-
 typescript@~4.4.4:
   version "4.4.4"
   resolved "https://registry.npmjs.org/typescript/-/typescript-4.4.4.tgz#2cd01a1a1f160704d3101fd5a58ff0f9fcb8030c"
   integrity sha512-DqGhF5IKoBl8WNf8C1gu8q0xZSInh9j1kJJMqT3a94w1JzVaBU4EXOSMrz9yDqMT0xt3selp83fuFMQ0uzv6qA==
 
+typescript@~4.5.2, typescript@~4.5.4:
+  version "4.5.4"
+  resolved "https://registry.npmjs.org/typescript/-/typescript-4.5.4.tgz#a17d3a0263bf5c8723b9c52f43c5084edf13c2e8"
+  integrity sha512-VgYs2A2QIRuGphtzFV7aQJduJ2gyfTljngLzjpfW9FoYZF6xuw1W0vW9ghCKLfcWrCFxK81CSGRAvS1pn4fIUg==
+
 ua-parser-js@^0.7.18:
   version "0.7.28"
   resolved "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.28.tgz#8ba04e653f35ce210239c64661685bf9121dec31"