chore: update to yarnv3 and fix missing packages preventing install

.gitignore

@@ -20,3 +20,12 @@ bundle.mobile.js.map
 export-2020-01-10.csv
 
 **/*.log
+
+# Yarn
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions

.yarnrc.yml

@@ -0,0 +1,7 @@
+nodeLinker: node-modules
+
+plugins:
+  - path: .yarn/plugins/@yarnpkg/plugin-workspace-tools.cjs
+    spec: "@yarnpkg/plugin-workspace-tools"
+
+yarnPath: .yarn/releases/yarn-3.2.0.cjs

package.json

@@ -62,6 +62,7 @@
     "cross-env": "^5.1.5",
     "husky": "^3.0.4",
     "npm-run-all": "^4.1.3",
+    "patch-package": "^6.1.2",
     "prettier": "^1.18.1",
     "pretty-quick": "^1.11.1",
     "shelljs": "^0.8.2",
@@ -85,5 +86,6 @@
     "@babel/runtime": "^7.15.1",
     "@babel/helper-plugin-utils": "^7.14.5",
     "react-error-overlay": "6.0.9"
-  }
+  },
+  "packageManager": "yarn@3.2.0"
 }

packages/loot-core/package.json

@@ -43,6 +43,7 @@
     "babel-jest": "25.2.6",
     "babel-loader": "^8.0.6",
     "buffer": "^5.5.0",
+    "cross-env": "^7.0.3",
     "damerau-levenshtein": "^1.0.4",
     "date-fns": "2.0.0-alpha.27",
     "esm": "^3.0.82",
@@ -54,14 +55,14 @@
     "lru-cache": "^5.1.1",
     "memfs": "3.1.1",
     "memoize-one": "^4.0.0",
-    "mockdate": "^3.0.5",
     "mock-require": "^3.0.2",
+    "mockdate": "^3.0.5",
     "murmurhash": "^0.0.2",
     "perf-deets": "^1.0.15",
     "sanitize-filename": "^1.6.1",
     "search-query-parser": "^1.3.0",
-    "source-map": "^0.7.3",
     "snapshot-diff": "^0.2.2",
+    "source-map": "^0.7.3",
     "throttleit": "^1.0.0",
     "uuid": "3.3.2",
     "webpack": "^4.41.2",

packages/mobile/package.json

@@ -31,6 +31,7 @@
     "metro-react-native-babel-preset": "^0.66.2",
     "nodejs-mobile-gyp": "^0.3.1",
     "nodejs-mobile-react-native": "0.6.3",
+    "patch-package": "^6.1.2",
     "react": "16.9.0",
     "react-native": "0.65.1",
     "react-native-codegen": "^0.0.7",