Support servant-0.20.

Author: ocharles

servant-multipart-api/servant-multipart-api.cabal

@@ -36,7 +36,7 @@ library
 
   -- other dependencies
   build-depends:
-      servant             >=0.16     && <0.20
+      servant             >=0.16     && <0.21
 
   -- servant-0.19 dropped support for GHC-8.4 (latest GHCJS version),
   -- due to QuantifiedConstraints

servant-multipart-client/servant-multipart-client.cabal

@@ -38,8 +38,8 @@ library
   build-depends:
       servant-multipart-api == 0.12.*
     , http-media          >=0.7.1.3  && <0.9
-    , servant             >=0.16     && <0.20
-    , servant-client-core >=0.16     && <0.20
+    , servant             >=0.16     && <0.21
+    , servant-client-core >=0.16     && <0.21
 
   -- servant-0.19 dropped support for GHC-8.4 (latest GHCJS version),
   -- due to QuantifiedConstraints

servant-multipart/servant-multipart.cabal

@@ -38,10 +38,10 @@ library
       servant-multipart-api == 0.12.*
     , lens                >=4.17     && <5.3
     , resourcet           >=1.2.2    && <1.3
-    , servant             >=0.16     && <0.20
+    , servant             >=0.16     && <0.21
     , servant-docs        >=0.10     && <0.20
     , servant-foreign     >=0.15     && <0.20
-    , servant-server      >=0.16     && <0.20
+    , servant-server      >=0.16     && <0.21
     , string-conversions  >=0.4.0.1  && <0.5
     , wai                 >=3.2.1.2  && <3.3
     , wai-extra           >=3.0.24.3 && <3.2