feat(enforce-type-declaration-immutableness): create rule

Author: RebeccaStevens

package.json

@@ -68,6 +68,7 @@
     "@typescript-eslint/utils": "^5.10.2",
     "deepmerge-ts": "^4.0.3",
     "escape-string-regexp": "^4.0.0",
+    "is-immutable-type": "^0.0.6",
     "semver": "^7.3.7"
   },
   "devDependencies": {

src/configs/all.ts

@@ -19,6 +19,7 @@ const config: Linter.Config = {
     {
       files: ["*.ts", "*.tsx"],
       rules: {
+        "functional/enforce-type-immutableness": "error",
         "functional/no-method-signature": "error",
         "functional/no-mixed-type": "error",
         "functional/prefer-readonly-type": "error",

src/configs/no-mutations.ts

@@ -9,6 +9,7 @@ const config: Linter.Config = {
     {
       files: ["*.ts", "*.tsx"],
       rules: {
+        "functional/enforce-type-immutableness": "error",
         "functional/no-method-signature": "warn",
         "functional/prefer-readonly-type": "error",
       },