lsp < 2.0 since lsp-types fails to compile (haskell/lsp#492)

build-constraints.yaml

@@ -7828,6 +7828,12 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/7003
         - megaparsec < 9.4
         - megaparsec-tests < 9.4
+
+        # https://github.com/haskell/lsp/issues/492
+        - lsp < 2.0
+        - lsp-test < 0.15
+        - lsp-types < 2.0
+    # end of Stackage upper bounds
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of