[Bug]: verifying the version number

[iamayushdas]

Issue description

unable to verify version number

Expected behavior

2.4 version should get verified

This is because when verifying the version number, the . In 2.4 is used as a regular expression to match all strings.
You could submit another commit to avoid this problem.
To fix this problem, we could change this line of code
https://github.com/apache/apisix-dashboard/blob/master/api/test/shell/cli_test.sh#L177
to :

if [[ `grep -c -w "${VERSION}" ${STDOUT}` -ne '1' ]]; then