Ignore Browser List's version check

Gao
Recently, CI building always fails. The reason is that browser list db needs to be update. But the browser list db is not required in the current project, it cannot be update in the current project unless I install the db directly. The Way to resolve this problem is to ignore the checking. Fortunately, It has an envariament variable that can do this. ```bash export BROWSERSLIST_IGNORE_OLD_DATA=yes ```