Tests: TS: add back missing type checking

tsx does not run any type checking, hence a separate
tsc step is needed .

Author: larabr

package.json

@@ -58,7 +58,8 @@
     }
   },
   "scripts": {
-    "test-type-definitions": "tsx test/typescript.test.ts && tsx --tsconfig test/tsconfig.es5.json test/typescript.test.ts",
+    "test-type-definitions": "tsc --project test/tsconfig.test.json && tsx test/typescript.test.ts",
+    "test-type-definitions-es5": "tsc --project test/tsconfig.es5.json && tsx --tsconfig test/tsconfig.es5.json test/typescript.test.ts",
     "test-browser": "karma start karma.conf.cjs",
     "test-node": "ts-mocha -n loader=ts-node/esm ./test/node.test.ts ./test/common.test.ts",
     "lint": "eslint lib test",

test/tsconfig.es5.json

@@ -0,0 +1,6 @@
+{
+    "extends": "./tsconfig.test.json",
+    "compilerOptions": {
+        "target": "es5"
+    }
+}

test/tsconfig.es5.test.json

@@ -0,0 +1,8 @@
+{
+    "extends": "../tsconfig.json",
+    "compilerOptions": {
+        "noEmit": true // code tested by tsx
+    },
+    "files": ["typescript.test.ts"]
+
+}