Add Encode typeclass

package.yaml

@@ -9,10 +9,20 @@ extra-source-files:
   - README.org
 
 dependencies:
-  - base >= 4.13 && < 5
+  - base
+  - unix
+  - text
+  - bytestring
+  - base64-bytestring
 
 ghc-options:
   - -Wall
+  - -fdefer-typed-holes
+
+default-extensions:
+  - BlockArguments
+  - OverloadedStrings
+  - ImportQualifiedPost
 
 library:
   source-dirs: src
@@ -27,3 +37,26 @@ executables:
       - filepack
     verbatim:
       default-language: GHC2021
+
+tests:
+  spec:
+    cpp-options: -DTEST
+    main: Spec.hs
+    source-dirs:
+      - test/spec
+    dependencies:
+      - filepack
+      - hspec
+      - QuickCheck
+      - quickcheck-instances
+      # - quickcheck-text
+    build-tools: hspec-discover
+    verbatim:
+      default-language: GHC2021
+  doctest:
+    main: Doctest.hs
+    source-dirs:
+      - test/doctest
+    dependencies:
+      - process
+    build-tools: doctest