Revert "Run on PRs where head does not equal base."
Revert "Run on PRs where head does not equal base."

This reverts commit da838ecc5c7c52dd41ceb6564ce558ba6b079623.

EOSIO/eos,EOSIO/eos,EOSIO/eos,EOSIO/eos,EOSIO/eos