Add Alexey Khudyakov's packages

Also histogram-fill moved from FP Complete to me

build-constraints.yaml

@@ -82,7 +82,6 @@ packages:
         #- fpco-api
         - gtk2hs-buildtools
         - happy
-        - histogram-fill
         - hmatrix
         - hmatrix-gsl
         - hxt
@@ -1202,6 +1201,12 @@ packages:
         # package name is haskell-neo4j-client github name is haskell-neo4j-rest-client
         - haskell-neo4j-client 
 
+    "Alexey Khudyakov <alexey.skladnoy@gmail.com> @Shimuuar":
+        - histogram-fill
+        - fixed-vector
+        - fixed-vector-hetero
+        - type-level-numbers
+
     "Stackage upper bounds":
         # https://github.com/fpco/stackage/issues/537
         - zlib < 0.6