Fix code formatting problems

Author: nkuba

solidity/random-beacon/.eslintignore

@@ -1 +1,8 @@
-node_modules
+artifacts/
+build/
+cache/
+deployments/
+export/
+hardhat-dependency-compiler/
+typechain/
+export.json

solidity/random-beacon/.solhintignore

@@ -1 +1,2 @@
-node_modules/
+hardhat-dependency-compiler/
+node_modules/

solidity/random-beacon/test/RandomBeacon.Callback.test.ts

@@ -1,3 +1,5 @@
+/* eslint-disable @typescript-eslint/no-extra-semi */
+
 import { ethers, waffle, helpers } from "hardhat"
 import { expect } from "chai"
 

solidity/random-beacon/test/Reimbursable.test.ts

@@ -1,6 +1,6 @@
 /* eslint-disable @typescript-eslint/no-unused-expressions */
 
-import { ethers, waffle } from "hardhat"
+import { ethers } from "hardhat"
 import { expect } from "chai"
 
 import type { SignerWithAddress } from "@nomiclabs/hardhat-ethers/signers"