@uppy/svelte: fix TS build command (#4720)

packages/@uppy/svelte/.gitignore

@@ -1,4 +1,5 @@
 .DS_Store
 node_modules
 /dist/
-package-lock.json
+/src/empty.*
+package-lock.json

packages/@uppy/svelte/package.json

@@ -20,7 +20,7 @@
   },
   "devDependencies": {
     "@rollup/plugin-node-resolve": "^13.0.0",
-    "@tsconfig/svelte": "^3.0.0",
+    "@tsconfig/svelte": "^5.0.0",
     "rollup": "^2.60.2",
     "rollup-plugin-svelte": "^7.0.0",
     "svelte": "^4.0.0",

packages/@uppy/svelte/src/empty.ts

@@ -0,0 +1 @@
+// We need at least one `.ts` file otherwise tsc complains it cannot find anything to do.

yarn.lock

@@ -8119,10 +8119,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@tsconfig/svelte@npm:^3.0.0":
-  version: 3.0.0
-  resolution: "@tsconfig/svelte@npm:3.0.0"
-  checksum: 92986428a6aa87d5db9377de65cd7bd6bf73367bc3ec03bb06faba7db2ac51c45470402212914bbc76c00efa08e1116e9d269aea38274e04dbb183705dbb7a09
+"@tsconfig/svelte@npm:^5.0.0":
+  version: 5.0.2
+  resolution: "@tsconfig/svelte@npm:5.0.2"
+  checksum: c16608913db89c8bfc2df805224f12403dd9d2f6f9480cc293e3aae8d1897f3a2de44db14d7c039f0325358e139fb071ec843ee46445a7e10d5265fe48f6ae80
   languageName: node
   linkType: hard
 
@@ -10050,7 +10050,7 @@ __metadata:
   resolution: "@uppy/svelte@workspace:packages/@uppy/svelte"
   dependencies:
     "@rollup/plugin-node-resolve": ^13.0.0
-    "@tsconfig/svelte": ^3.0.0
+    "@tsconfig/svelte": ^5.0.0
     rollup: ^2.60.2
     rollup-plugin-svelte: ^7.0.0
     svelte: ^4.0.0