Move npm dependencies to git submodules (#153)

Author: ernestognw

.gitmodules

@@ -12,3 +12,11 @@
 [submodule "lib/email-tx-builder"]
 	path = lib/email-tx-builder
 	url = https://github.com/zkemail/email-tx-builder
+[submodule "lib/axelar-gmp-sdk-solidity"]
+	path = lib/axelar-gmp-sdk-solidity
+	tag = v6.0.6
+	url = https://github.com/axelarnetwork/axelar-gmp-sdk-solidity
+[submodule "lib/zk-email-verify"]
+	path = lib/zk-email-verify
+	branch = v6.3.2
+	url = https://github.com/zkemail/zk-email-verify

lib/axelar-gmp-sdk-solidity

@@ -17,8 +17,8 @@
     "prepare-docs": "scripts/prepare-docs.sh",
     "lint": "npm run lint:js && npm run lint:sol",
     "lint:fix": "npm run lint:js:fix && npm run lint:sol:fix",
-    "lint:js": "prettier --log-level warn '**/*.{js,ts}' --check && eslint .",
-    "lint:js:fix": "prettier --log-level warn '**/*.{js,ts}' --write && eslint . --fix",
+    "lint:js": "prettier --log-level warn '**/*.{js,ts}' --check && eslint . --ignore-pattern lib/",
+    "lint:js:fix": "prettier --log-level warn '**/*.{js,ts}' --write && eslint . --fix --ignore-pattern lib/",
     "lint:sol": "prettier --log-level warn '{contracts,test}/**/*.sol' --check && solhint '{contracts,test}/**/*.sol'",
     "lint:sol:fix": "prettier --log-level warn '{contracts,test}/**/*.sol' --write",
     "coverage": "scripts/checks/coverage.sh",
@@ -45,10 +45,6 @@
     "security",
     "zeppelin"
   ],
-  "peerDependencies": {
-    "@axelar-network/axelar-gmp-sdk-solidity": "^6.0.6",
-    "@zk-email/contracts": "^6.3.2"
-  },
   "devDependencies": {
     "@openzeppelin/contracts": "file:lib/@openzeppelin-contracts"
   },

lib/zk-email-verify

@@ -1,6 +1,6 @@
 @openzeppelin/contracts/=lib/@openzeppelin-contracts/contracts/
 @openzeppelin/contracts-upgradeable/=lib/@openzeppelin-contracts-upgradeable/contracts/
 @openzeppelin/community-contracts/=contracts/
-@axelar-network/axelar-gmp-sdk-solidity/=node_modules/@axelar-network/axelar-gmp-sdk-solidity/
+@axelar-network/axelar-gmp-sdk-solidity/=lib/axelar-gmp-sdk-solidity/
 @zk-email/email-tx-builder/=lib/email-tx-builder/packages/contracts/
-@zk-email/contracts/=node_modules/@zk-email/contracts/
+@zk-email/contracts/=lib/zk-email-verify/packages/contracts/