silence wrong tsconfig errors

src/compiler/tsconfig.json

@@ -5,7 +5,9 @@
 	"compilerOptions": {
 		"lib": ["es2017", "webworker"],
 		"allowJs": true,
-		"checkJs": true
+		"checkJs": true,
+		// silences wrong TS error, we don't compile, we only typecheck
+		"outDir": "./irrelevant/unused"
 
 		// TODO: remove mocha types from the whole project
 		// "types": ["node", "estree"]

tsconfig.json

@@ -9,6 +9,9 @@
 		"lib": ["es2017", "DOM", "DOM.Iterable"],
 		"target": "es2017",
 
+		// silences wrong TS error, we don't compile, we only typecheck
+		"outDir": "./irrelevant/unused",
+
 		"declaration": true,
 		"declarationDir": "types",