ci: bump Venom version to v0.28.0

[olblak]

ci: bump Venom version

ci: update Venom version to v0.28.0

all contents from 'file' and 'files' combined already up to date While nothing change in the current pipeline run, according to the git history, some commits must pushed

v0.28.0

Release published on the 2020-10-07 12:49:23 +0000 UTC at the url https://github.com/ovh/venom/releases/tag/v0.28.0

##  (2020-10-07)

### Features

* **cli**: allow multiple occurence of --var-from-file (#247) ([0d2ed76](https://github.com/ovh/venom/commit/0d2ed76)), closes [#247](https://github.com/ovh/venom/issues/247)
* **context/web**: add prefs for chromedriver (#257) (#258) ([749a51c](https://github.com/ovh/venom/commit/749a51c)), closes [#257](https://github.com/ovh/venom/issues/257) [#258](https://github.com/ovh/venom/issues/258)
* **dbfixtures**: add skipResetSequences parameter ([c1d7719](https://github.com/ovh/venom/commit/c1d7719))
* **executor/http**: added http debug infos in http executor (#259) ([dc7ae07](https://github.com/ovh/venom/commit/dc7ae07)), closes [#259](https://github.com/ovh/venom/issues/259)
* **executor/web**: Add text and value attribute in result of test step (#227) ([19b6f1a](https://github.com/ovh/venom/commit/19b6f1a)), closes [#227](https://github.com/ovh/venom/issues/227)
* **executor/web**: add gecko web driver (#225) ([c9c106c](https://github.com/ovh/venom/commit/c9c106c)), closes [#225](https://github.com/ovh/venom/issues/225)
* **executor/web**: add statement to manage select component (#229) ([9a166c8](https://github.com/ovh/venom/commit/9a166c8)), closes [#229](https://github.com/ovh/venom/issues/229)
* **executor/web**: add statement to upload file (#232) ([9d5460b](https://github.com/ovh/venom/commit/9d5460b)), closes [#232](https://github.com/ovh/venom/issues/232)
* **executor/web**: add statements to manage popup actions (#230) ([cce97ad](https://github.com/ovh/venom/commit/cce97ad)), closes [#230](https://github.com/ovh/venom/issues/230)
* **executor/web**: implement next window (#226) ([e4ba258](https://github.com/ovh/venom/commit/e4ba258)), closes [#226](https://github.com/ovh/venom/issues/226)
* **executor/web**: statement to manage browser history actions (#237) ([24e4e6c](https://github.com/ovh/venom/commit/24e4e6c)), closes [#237](https://github.com/ovh/venom/issues/237)
* **http**: read proxy from environment (#251) ([62a00a9](https://github.com/ovh/venom/commit/62a00a9)), closes [#251](https://github.com/ovh/venom/issues/251)
* **testfixtures**: upgrade testfixtures to v3 ([3686985](https://github.com/ovh/venom/commit/3686985))

### Bug Fixes

* **cli**: don't iterate over empty varFiles (#255) ([55f457d](https://github.com/ovh/venom/commit/55f457d)), closes [#255](https://github.com/ovh/venom/issues/255)
* **cli**: give higher priority to --var over --var-from-file (#246) ([50fdc39](https://github.com/ovh/venom/commit/50fdc39)), closes [#246](https://github.com/ovh/venom/issues/246)
* **executor/http**: save multiple set-cookie headers when returned by the server (#266) ([f9547b9](https://github.com/ovh/venom/commit/f9547b9)), closes [#266](https://github.com/ovh/venom/issues/266)
* **executor/http**: support setting host in headers (#218) ([e145c61](https://github.com/ovh/venom/commit/e145c61)), closes [#218](https://github.com/ovh/venom/issues/218)
* **executor/web**: add statements to manage frame (#228) ([07c6ecd](https://github.com/ovh/venom/commit/07c6ecd)), closes [#228](https://github.com/ovh/venom/issues/228)
* **executor/web**: merge conflicts ([11570d7](https://github.com/ovh/venom/commit/11570d7))
* **cli**: do not truncate filename in results (#273) ([b349e3a](https://github.com/ovh/venom/commit/b349e3a)), closes [#273](https://github.com/ovh/venom/issues/273) [#254](https://github.com/ovh/venom/issues/254)
* **test**: fix some http asserts (#272) ([941af31](https://github.com/ovh/venom/commit/941af31)), closes [#272](https://github.com/ovh/venom/issues/272)

### Documentation

* Add go-get info for cli to README (#268) ([6744939](https://github.com/ovh/venom/commit/6744939)), closes [#268](https://github.com/ovh/venom/issues/268)
* Update link to Submitting-Patches on CONTRIBUTING.md (#269) ([8f6cde4](https://github.com/ovh/venom/commit/8f6cde4)), closes [#269](https://github.com/ovh/venom/issues/269)
* add a note on JSON arrays (#264) ([5845416](https://github.com/ovh/venom/commit/5845416)), closes [#264](https://github.com/ovh/venom/issues/264)
* download latest release (#216) ([7b5dcec](https://github.com/ovh/venom/commit/7b5dcec)), closes [#216](https://github.com/ovh/venom/issues/216)
* some doc on venom run cmd (#271) ([a5ad48b](https://github.com/ovh/venom/commit/a5ad48b)), closes [#271](https://github.com/ovh/venom/issues/271)

---

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