Bump tempfile from 0.2.1 to 0.3.0 (#181)

Bumps [tempfile](https://github.com/ruby/tempfile) from 0.2.1 to 0.3.0.
- [Release notes](https://github.com/ruby/tempfile/releases)
- [Commits](ruby/tempfile@v0.2.1...v0.3.0)

---
updated-dependencies:
- dependency-name: tempfile
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -67,7 +67,7 @@ GEM
       rack-protection (= 4.0.0)
       sinatra (= 4.0.0)
       tilt (~> 2.0)
-    tempfile (0.2.1)
+    tempfile (0.3.0)
     thin (1.6.2)
       daemons (>= 1.0.9)
       eventmachine (>= 1.0.0)