Bumped minimum typescript version to 4.1

README.md

@@ -33,6 +33,7 @@ yarn add zod@next
 
 #### Breaking changes in v3
 
+- The minimum TypeScript version has increased from 3.7 to _4.1_. Several features have been rewritten to use [recursive conditional types](https://devblogs.microsoft.com/typescript/announcing-typescript-4-1/#recursive-conditional-types), an incredibly powerful new feature introduced in TS4.1.
 - Transformer syntax. Previously transformers required an input, an output schema, and a function to tranform between them. You created transformers like `z.transform(A, B, func)`, where `A` and `B` are Zod schemas. This is no longer the case. Accordingly:
 
   ⚠️ The old syntax (`z.transformer(A, B, func)`) is no longer available.

package.json

@@ -42,8 +42,6 @@
     "build:deno": "node ./deno/build.mjs",
     "build": "yarn run clean && tsc --p tsconfig.cjs.json",
     "build:esm": "tsc --p tsconfig.esm.json",
-    "buildall": "yarn add [email protected] && yarn build && yarn add [email protected] && yarn build && yarn add [email protected] && yarn build && yarn add [email protected] && yarn build && yarn add [email protected] && yarn build && yarn add [email protected] && yarn build && yarn add typescript@4 && yarn build && yarn add [email protected]",
-    "buildallv3": "yarn add [email protected] && yarn build && yarn add [email protected] && yarn build && yarn add [email protected] && yarn build && yarn add [email protected] && yarn build && yarn add [email protected]",
     "test": "jest --coverage && yarn run badge",
     "testone": "jest",
     "badge": "make-coverage-badge --output-path ./coverage.svg",
@@ -68,7 +66,7 @@
     "prettier": "^2.2.1",
     "ts-jest": "^26.4.4",
     "ts-node": "^9.1.0",
-    "typescript": "3.8"
+    "typescript": "4.1"
   },
   "husky": {
     "hooks": {

yarn.lock

@@ -5271,10 +5271,10 @@ typedarray-to-buffer@^3.1.5:
   dependencies:
     is-typedarray "^1.0.0"
 
-typescript@3.8:
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
-  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
+typescript@4.1:
+  version "4.1.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.1.3.tgz#519d582bd94cba0cf8934c7d8e8467e473f53bb7"
+  integrity sha512-B3ZIOf1IKeH2ixgHhj6la6xdwR9QrLC5d1VKeCSY4tvkqhF2eqd9O7txNlS0PO3GrBAFIdr3L1ndNwteUbZLYg==
 
 uglify-js@^3.1.4:
   version "3.12.1"