Add changelog

Author: wismill

changelog.d/pr-8732

@@ -0,0 +1,10 @@
+synopsis: Fix repl discarding --build-depends
+packages: cabal-install
+prs: #8732
+issues: #6859 #7081
+
+description: {
+
+- Fix `repl` command discarding `--build-depends` argument when using 
+  `allow-newer` or `allow-older`.
+}