Applies Yarn 4.x .gitignore settings (#168)

* chore(firebase): lock @celo/ package versions

To avoid resolution conflict. We'll update versions later

* chore(gitignore): adds Yarn 4.x settings to gitignore

Copied the setting for "If you're not using Zero-Installs" from the official Yarn 4.x documentation.

Source: https://yarnpkg.com/getting-started/qa#which-files-should-be-gitignored

Context regarding "Zero-installs": https://yarnpkg.com/features/caching#zero-installs

* chore(gitignore): deletes existing `.yarn/install-state.gz` file

This was mistakenly committed in the past and is not necessary.

> `.yarn/install-state.gz` is an optimization file that you shouldn't ever have to commit. It simply stores the exact state of your project so that the next commands can boot without having to resolve your workspaces all over again.

Source: https://yarnpkg.com/getting-started/qa#which-files-should-be-gitignored

.gitignore

@@ -50,6 +50,18 @@ dist/
 npm-debug.log
 yarn-error.log
 
+# Yarn
+# Copied from the official Yarn 4.x documentation.
+# Source: https://yarnpkg.com/getting-started/qa#which-files-should-be-gitignored
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+
+
 # BUCK
 buck-out/
 \.buckd/

apps/firebase/package.json

@@ -18,9 +18,9 @@
     "build:rules": "firebase-bolt database-rules.bolt"
   },
   "dependencies": {
-    "@celo/connect": "^5.0.0",
-    "@celo/contractkit": "^6.0.0",
-    "@celo/utils": "^5.0.0",
+    "@celo/connect": "5.1.1",
+    "@celo/contractkit": "6.0.0",
+    "@celo/utils": "5.0.6",
     "@firebase/app": "^0.9.6",
     "@google-cloud/logging": "^11.0.0",
     "@mento-protocol/mento-sdk": "^0.1.4",

yarn.lock

@@ -102,7 +102,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@celo/connect@npm:^5.0.0, @celo/connect@npm:^5.1.1":
+"@celo/connect@npm:5.1.1, @celo/connect@npm:^5.1.1":
   version: 5.1.1
   resolution: "@celo/connect@npm:5.1.1"
   dependencies:
@@ -123,7 +123,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@celo/contractkit@npm:^6.0.0":
+"@celo/contractkit@npm:6.0.0":
   version: 6.0.0
   resolution: "@celo/contractkit@npm:6.0.0"
   dependencies:
@@ -150,9 +150,9 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@celo/faucet-app@workspace:apps/firebase"
   dependencies:
-    "@celo/connect": "npm:^5.0.0"
-    "@celo/contractkit": "npm:^6.0.0"
-    "@celo/utils": "npm:^5.0.0"
+    "@celo/connect": "npm:5.1.1"
+    "@celo/contractkit": "npm:6.0.0"
+    "@celo/utils": "npm:5.0.6"
     "@firebase/app": "npm:^0.9.6"
     "@google-cloud/logging": "npm:^11.0.0"
     "@mento-protocol/mento-sdk": "npm:^0.1.4"
@@ -184,7 +184,7 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@celo/utils@npm:^5.0.0, @celo/utils@npm:^5.0.6":
+"@celo/utils@npm:5.0.6, @celo/utils@npm:^5.0.6":
   version: 5.0.6
   resolution: "@celo/utils@npm:5.0.6"
   dependencies: