Upgrade to v5 schema

Now uses:
* ipld direct_by_leaf StateDB for basic queries
* trie_by_cid StateDB for trie slice and proof queries

Also:
* vulcanize => cerc refactor
* Backend method to close dbs
* state tests are in multiple packages, to allow separate ginkgo suites
* removes gap-filler module
* integration tests and github workflows
* run stack-orchestrator for testnet
* fix various issues with tests, hardhat server, dockerfile
* fix cmd flags / env vars
* fix flaky tests and clean up code
* remove unused code, scripts
* remove outdated docs
* update version

test/contract/package.json

@@ -4,23 +4,21 @@
   "main": "index.js",
   "scripts": {
     "compile": "npx hardhat compile",
-    "start": "HARDHAT_NETWORK=docker node src/index.js",
-    "start:local": "ETH_ADDR=http://127.0.0.1:8545 npm run start",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "start": "node src/index.js"
   },
   "keywords": [],
   "author": "",
   "license": "ISC",
-  "description": "",
+  "description": "Solidity contract deployment server for integration testing",
   "dependencies": {
     "@openzeppelin/contracts": "^4.0.0",
-    "fastify": "^3.14.2",
-    "hardhat": "^2.2.0",
+    "fastify": "^4.0.0",
+    "hardhat": "^2.14.0",
     "solidity-create2-deployer": "^0.4.0"
   },
   "devDependencies": {
-    "@nomiclabs/hardhat-ethers": "^2.0.2",
-    "@nomiclabs/hardhat-waffle": "^2.0.1",
+    "@nomiclabs/hardhat-ethers": "^2.2.3",
+    "@nomiclabs/hardhat-waffle": "^2.0.4",
     "chai": "^4.3.4",
     "ethereum-waffle": "^3.3.0",
     "ethers": "^5.1.0"