Rebuild sources before testing

Author: walles

package.json

@@ -30,7 +30,7 @@
     "package": "webpack --mode production --devtool hidden-source-map",
     "publish": "vsce publish",
     "compile-tests": "tsc -p . --outDir out",
-    "pretest": "npm run compile-tests && npm run lint",
+    "pretest": "npm run compile && npm run compile-tests && npm run lint",
     "test": "vscode-tmgrammar-test -g tests/support/diff.tmLanguage.json tests/unit/*.test && node ./out/test/runTest.js",
     "vscode:prepublish": "npm run package",
     "watch": "webpack --mode development --watch",