fixup! hardhat version

Author: matheusaaguiar

test/externalTests/gp2.sh

@@ -69,7 +69,7 @@ function gp2_test
     # We require to install hardhat 2.20.0 due to support for evm version cancun, otherwise we get the following error:
     # Invalid value {"blockGasLimit":12500000,"hardfork":"cancun","allowUnlimitedContractSize":true} for HardhatConfig.networks.hardhat - Expected a value of type HardhatNetworkConfig.
     # See: https://github.com/NomicFoundation/hardhat/issues/4176
-    yarn add hardhat@2.20.0
+    yarn add hardhat
 
     # Ignore bench directory which fails to compile with current hardhat and ethers versions.
     # bench/trace/gas.ts:123:19 - error TS2339: Property 'equals' does not exist on type 'Uint8Array'.

test/externalTests/pool-together.sh

@@ -68,7 +68,7 @@ function pool_together_test
     yarn install
     # Hardhat 2.20.0 is the last version that works. Newer versions throw this error:
     # Unexpected config HardhatConfig.networks.hardhat.initialBaseFeePerGas found - This field is only valid for networks with EIP-1559. Try a newer hardfork or remove it.
-    yarn add hardhat@2.20.0
+    yarn add hardhat
 
     # These come with already compiled artifacts. We want them recompiled with latest compiler.
     rm -r node_modules/@pooltogether/yield-source-interface/artifacts/

test/externalTests/uniswap.sh

@@ -93,7 +93,7 @@ function uniswap_test
     # We set hardhat version to 2.20.0 since version 2.21.0 has issues with solidity-coverage plugin
     # that often causes out-of-memory errors.
     # See hardhat note about the issue here: https://github.com/NomicFoundation/hardhat/releases/tag/hardhat@2.21.0
-    pnpm install hardhat@2.20.0
+    pnpm install hardhat
 
     replace_version_pragmas
 

test/externalTests/zeppelin.sh

@@ -108,7 +108,7 @@ function zeppelin_test
     # We require to install hardhat 2.20.0 due to support for evm version cancun, otherwise we get the following error:
     # Invalid value {"blockGasLimit":10000000,"allowUnlimitedContractSize":true,"hardfork":"cancun"} for HardhatConfig.networks.hardhat - Expected a value of type HardhatNetworkConfig.
     # See: https://github.com/NomicFoundation/hardhat/issues/4176
-    npm install hardhat@2.20.0
+    npm install hardhat
 
     replace_version_pragmas
     for preset in $SELECTED_PRESETS; do