.travis.yml: force updating homebrew on OSX

Workaround for Travis failures as described in https://travis-ci.community/t/macos-build-fails-because-of-homebrew-bundle-unknown-command/7296/18

.travis.yml: force updating homebrew on OSX
5faf7605 · Max Kellermann · 5fe70a34 · 5faf7605
Commit 5faf7605 authored Mar 07, 2020 by Max Kellermann
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.travis.yml .travis.yml +1 -0

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--- a/.travis.yml
+++ b/.travis.yml
@@ -126,6 +126,7 @@ matrix:
          packages:
            - ccache
            - meson
+          update: true
      env:
        - MATRIX_EVAL="export PATH=/usr/local/opt/ccache/libexec:$PATH HOMEBREW_NO_ANALYTICS=1"