Don't package the .gitmodules file

diff --git a/.pkgmeta b/.pkgmeta
index 4eec6cf..6c1138c 100644
--- a/.pkgmeta
+++ b/.pkgmeta
@@ -13,6 +13,7 @@ manual-changelog:
     markup-type: markdown

 ignore:
+    - .gitmodules
     - README.md
     - CONTRIBUTING.md
     - embeds/LibStub/tests