Bumped upper bound of effectful dependency

 * Removed effectful-core dependency; All relevant modules of that package are
   re-exported by the effectful package.

 * Bumped lower bound of the base dependency. We only support GHC >=8.10.7.

 * Distribute license file with the source code.

Author: mmhat

typed-process-effectful.cabal

@@ -58,7 +58,7 @@ library
   -- cabal-gild: discover src/ --include=src/**/*.hs
   exposed-modules: Effectful.Process.Typed
   build-depends:
-    base >=4.14 && <5,
+    base >=4.16 && <5,
     bytestring <0.13,
     effectful >=2.0 && <2.6,
     typed-process >=0.2.8 && <0.3,