Fix docsgen compilation

The docsgen tsconfig was referencing `tsconfig.base.json`, which
specifies the `include` option for the primary project. As a result,
the `compile:docs` script was building the library's code, and
outputting it to `dist/docsgen`.

This commit fixes this by overriding `include` in
`docsgen/tsconfig.json`.

Author: ItsHarper

docsgen/tsconfig.json

@@ -8,5 +8,8 @@
             "esnext",
             "es6"
         ]
-    }
-}
+    },
+    "include": [
+        "."
+    ]
+}