Bump to Yarn v4

Upgrading to v4 allows us to bring over more things from the module
template, such as JavaScript constraints.

4.7.0 is the latest version at the time of this writing.

Author: mcmire

.gitattributes

@@ -1,3 +1,8 @@
 * text=auto
 
 yarn.lock linguist-generated=false
+
+# yarn v3
+# See: https://yarnpkg.com/getting-started/qa#which-files-should-be-gitignored
+/.yarn/releases/** binary
+/.yarn/plugins/** binary

.gitignore

@@ -90,3 +90,13 @@ Temporary Items
 .apdisk
 
 # End of https://www.gitignore.io/api/osx,node
+
+# yarn v3 (w/o zero-install)
+# See: https://yarnpkg.com/getting-started/qa#which-files-should-be-gitignored
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions

.yarn/plugins/@yarnpkg/plugin-allow-scripts.cjs

@@ -0,0 +1,9 @@
+/* eslint-disable */
+//prettier-ignore
+module.exports = {
+name: "@yarnpkg/plugin-allow-scripts",
+factory: function (require) {
+var plugin=(()=>{var a=Object.create,l=Object.defineProperty;var i=Object.getOwnPropertyDescriptor;var s=Object.getOwnPropertyNames;var p=Object.getPrototypeOf,c=Object.prototype.hasOwnProperty;var u=e=>l(e,"__esModule",{value:!0});var f=e=>{if(typeof require!="undefined")return require(e);throw new Error('Dynamic require of "'+e+'" is not supported')};var g=(e,o)=>{for(var r in o)l(e,r,{get:o[r],enumerable:!0})},m=(e,o,r)=>{if(o&&typeof o=="object"||typeof o=="function")for(let t of s(o))!c.call(e,t)&&t!=="default"&&l(e,t,{get:()=>o[t],enumerable:!(r=i(o,t))||r.enumerable});return e},x=e=>m(u(l(e!=null?a(p(e)):{},"default",e&&e.__esModule&&"default"in e?{get:()=>e.default,enumerable:!0}:{value:e,enumerable:!0})),e);var k={};g(k,{default:()=>d});var n=x(f("@yarnpkg/shell")),y={hooks:{afterAllInstalled:async()=>{let e=await(0,n.execute)("yarn run allow-scripts");e!==0&&process.exit(e)}}},d=y;return k;})();
+return plugin;
+}
+};

.yarnrc

@@ -0,0 +1,17 @@
+compressionLevel: mixed
+
+enableGlobalCache: false
+
+enableScripts: false
+
+enableTelemetry: 0
+
+logFilters:
+  - code: YN0004
+    level: discard
+
+nodeLinker: node-modules
+
+plugins:
+  - path: .yarn/plugins/@yarnpkg/plugin-allow-scripts.cjs
+    spec: "https://raw.githubusercontent.com/LavaMoat/LavaMoat/main/packages/yarn-plugin-allow-scripts/bundles/@yarnpkg/plugin-allow-scripts.js"

.yarnrc.yml

@@ -28,8 +28,8 @@
   "devDependencies": {
     "@lavamoat/allow-scripts": "^2.5.1",
     "@metamask/auto-changelog": "^3.3.0",
-    "@metamask/eth-json-rpc-middleware": "^15.0.0",
     "@metamask/eth-block-tracker": "^11.0.1",
+    "@metamask/eth-json-rpc-middleware": "^15.0.0",
     "ganache": "^7.9.2",
     "sinon": "^15.2.0",
     "tape": "^5.7.0"
@@ -62,5 +62,5 @@
       "ganache>utf-8-validate": false
     }
   },
-  "packageManager": "yarn@1.22.22"
+  "packageManager": "yarn@4.7.0"
 }