chore: add typing to specs

Author: devsheva

tsconfig.build.json

@@ -0,0 +1,7 @@
+{
+    "extends": "./tsconfig.json",
+    "exclude": [
+        "spec/**/*.ts",
+        "test/**/*.ts"
+    ]
+}

tsconfig.json

@@ -7,5 +7,6 @@
     },
     "include": [
         "src/**/*.ts",
+        "spec/**/*.ts"
     ]
 }