Add version specific test aliases to the template

To help new contributors add example aliases to the bitcoind template in
`contrib` for all of the currently supported core versions.

Author: jamillambert

contrib/templates/bitcoind_aliases

@@ -14,3 +14,19 @@ alias bt26='/opt/bitcoin-26.2/bin/bitcoin-cli -regtest -rpcuser=user -rpcpasswor
 alias bt27='/opt/bitcoin-27.2/bin/bitcoin-cli -regtest -rpcuser=user -rpcpassword=password -rpcport=27249'
 alias bt28='/opt/bitcoin-28.1/bin/bitcoin-cli -regtest -rpcuser=user -rpcpassword=password -rpcport=28149'
 alias bt29='/opt/bitcoin-29.0/bin/bitcoin-cli -regtest -rpcuser=user -rpcpassword=password -rpcport=29049'
+
+# Test aliases for different Bitcoin Core versions
+
+alias test17='BITCOIND_EXE=/opt/bitcoin-0.17.2/bin/bitcoind cargo test --features="0_17_2"'
+alias test18='BITCOIND_EXE=/opt/bitcoin-0.18.1/bin/bitcoind cargo test --features="0_18_1"'
+alias test19='BITCOIND_EXE=/opt/bitcoin-0.19.1/bin/bitcoind cargo test --features="0_19_1"'
+alias test20='BITCOIND_EXE=/opt/bitcoin-0.20.2/bin/bitcoind cargo test --features="0_20_2"'
+alias test21='BITCOIND_EXE=/opt/bitcoin-0.21.2/bin/bitcoind cargo test --features="0_21_2"'
+alias test22='BITCOIND_EXE=/opt/bitcoin-22.1/bin/bitcoind cargo test --features="22_1"'
+alias test23='BITCOIND_EXE=/opt/bitcoin-23.2/bin/bitcoind cargo test --features="23_2"'
+alias test24='BITCOIND_EXE=/opt/bitcoin-24.2/bin/bitcoind cargo test --features="24_2"'
+alias test25='BITCOIND_EXE=/opt/bitcoin-25.2/bin/bitcoind cargo test --features="25_2"'
+alias test26='BITCOIND_EXE=/opt/bitcoin-26.2/bin/bitcoind cargo test --features="26_2"'
+alias test27='BITCOIND_EXE=/opt/bitcoin-27.2/bin/bitcoind cargo test --features="27_2"'
+alias test28='BITCOIND_EXE=/opt/bitcoin-28.1/bin/bitcoind cargo test --features="28_1"'
+alias test29='BITCOIND_EXE=/opt/bitcoin-29.0/bin/bitcoind cargo test --features="29_0"'