New Feature: support .deno-version file like .dvmrc #27
Description
Expected behavior
cat .deno-version
# 1.45.0
dvm use
# Found '/current/path/.deno-version' with version v1.45.0
# Using deno v1.45.0 now{{ message }}
cat .deno-version
# 1.45.0
dvm use
# Found '/current/path/.deno-version' with version v1.45.0
# Using deno v1.45.0 now