chore(deps): update dependency hardhat to v2.15.0 (#128)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

yarn.lock

@@ -4636,9 +4636,9 @@ hardhat-gas-reporter@^1.0.9:
     sha1 "^1.1.1"
 
 hardhat@^2.12.7:
-  version "2.14.1"
-  resolved "https://registry.yarnpkg.com/hardhat/-/hardhat-2.14.1.tgz#4dd252717f4987d8221c4f6fd08233b7f4251fd8"
-  integrity sha512-H3Qp/UKyQGmPDDBSfMoSyH18rRnac90rsb0LNer+sKe6at6rxLe4D5j+M+1icqZQF02iLPjNRwc/PA8OPf757A==
+  version "2.15.0"
+  resolved "https://registry.yarnpkg.com/hardhat/-/hardhat-2.15.0.tgz#0cacb2b44c4c4651aa8ab649fef12804848b0267"
+  integrity sha512-cC9tM/N10YaES04zPOp7yR13iX3YibqaNmi0//Ep40Nt9ELIJx3kFpQmucur0PAIfXYpGnw5RuXHNLkxpnVHEw==
   dependencies:
     "@ethersproject/abi" "^5.1.2"
     "@metamask/eth-sig-util" "^4.0.0"
@@ -5365,9 +5365,9 @@ isstream@~0.1.2:
   integrity sha512-Yljz7ffyPbrLpLngrMtZ7NduUgVvi6wG9RJ9IUcyCd59YQ911PBJphODUcbOVbqYfxe1wuYf/LJ8PauMRwsM/g==
 
 js-sdsl@^4.1.4:
-  version "4.4.0"
-  resolved "https://registry.yarnpkg.com/js-sdsl/-/js-sdsl-4.4.0.tgz#8b437dbe642daa95760400b602378ed8ffea8430"
-  integrity sha512-FfVSdx6pJ41Oa+CF7RDaFmTnCaFhua+SNYQX74riGOpl96x+2jQCqEfQ2bnXu/5DPCqlRuiqyvTJM0Qjz26IVg==
+  version "4.4.1"
+  resolved "https://registry.yarnpkg.com/js-sdsl/-/js-sdsl-4.4.1.tgz#9e3c7b566d8d9a7e1fe8fc26d00b5ab0f8918ab3"
+  integrity sha512-6Gsx8R0RucyePbWqPssR8DyfuXmLBooYN5cZFZKjHGnQuaf7pEzhtpceagJxVu4LqhYY5EYA7nko3FmeHZ1KbA==
 
 [email protected], js-sha3@^0.5.7:
   version "0.5.7"