Rename invoke.ts to test.ts

Author: yhzhang0128

examples/sol-anchor-contract/Anchor.toml

@@ -7,4 +7,4 @@ wallet = "~/.config/solana/id.json"
 
 [scripts]
 install = "npm install"
-invoke = "yarn run ts-mocha -p ./tsconfig.json -t 1000000 scripts/invoke.ts"
+test = "yarn run ts-mocha -p ./tsconfig.json -t 1000000 scripts/test.ts"