Refactor: upgrade version & ci

[bdronneau]

Hello @airbe, @wowane and @ma-serge,

Here some updates on this wonderful provider. Maybe more to come on release process. I think move from travis to Github Action can be a good idea (speed and lisibilty), that's why I add it.

https://github.com/MeilleursAgents/terraform-provider-ansiblevault/pull/123 will be obsolete.

Feel free to release a new version after this PR, this will solve https://github.com/MeilleursAgents/terraform-provider-ansiblevault/pull/123

Best

Before creating my pull-request, I ensure:

• [x] Documentation is written
• [x] Unit tests are written and green
• [x] I've cleaned my WIP or meaningless commits
• [x] Examples are up-to-date

In order to validate the pull request, I do:

• build the provider
• Use in dev mode in the example directory

[codecov[bot]]

Codecov Report

Merging #126 (8c9fd73) into master (81c187b) will decrease coverage by 0.16%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #126      +/-   ##
==========================================
- Coverage   93.02%   92.85%   -0.17%     
==========================================
  Files           5        5              
  Lines         172      210      +38     
==========================================
+ Hits          160      195      +35     
- Misses          8       11       +3     
  Partials        4        4              

Impacted Files	Coverage Δ
pkg/provider/in_env.go	90.00% <ø> (-0.63%)	:arrow_down:
pkg/provider/in_path.go	90.00% <ø> (-0.63%)	:arrow_down:
pkg/provider/in_string.go	89.47% <ø> (-0.53%)	:arrow_down:
pkg/provider/provider.go	91.66% <0.00%> (-0.44%)	:arrow_down:
pkg/vault/vault.go	100.00% <0.00%> (ø)

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[ma-serge]

hello @bdronneau ! I'm so happy to see you again :)