Dependency updates and CI changes

Implemented enhancements:

• Make Travis test gem installation #63

Merged pull requests:

• Allow newer versions of Faraday #93 (Pontus4)
• Run tests on GitHub Actions #92 (walro)
• Test with latest Ruby/JRuby versions and drop support for Ruby 2.4 #91 (roback)
• Bump rake version #90 (walro)
• Newer Ruby on Travis #89 (roback)
• Test gem installation on TravisCI #88 (roback)

Unique exceptions for 401/402 errors and reduce memory consumption in general

Implemented enhancements:

• Differentiate between 401 and 402 status codes #80
• Low hanging fruit that would reduce memory consumption #75
• Add fixture for "Invalid language code(s)" #56

Fixed bugs:

• Inconsistent formating in Result#inspect #79
• Uninitialized variable warnings #76

Merged pull requests:

• Drop support for older Rubies #87 (walro)
• AuthError -> AuthenticationError/AuthorizationError #86 (jage)
• Travis for modern Rubies #85 (jage)
• Profile for object allocation and pick some fruit #84 (jage)
• Improve Result#inspect output #83 (jage)
• Initialize variables to avoid warnings #82 (jage)
• Remove deprecated Query#language usage in example #81 (jage)

Add Post#to_h for both LiveFeed and Search

• Add Post#to_h for both LiveFeed and Search (#77)

Looser requirement on Faraday

(v5.1.4 was released on 2018-02-23, the GitHub release was created afterwards)

Full Changelog

Implemented enhancements:

• Looser requirement on Faraday #70

Fixed bugs:

• Update yard gem dependency #72

Merged pull requests:

• Looser requirements on Faraday #74 (jage)
• Test with latest Ruby versions #73 (dentarg)
• Test with latest rubies, support Ruby 2.4 and JRuby 9.1 #71 (walro)

Bugfix for datetime in query

• Timezone information should not be part of timestamps sent to Search API (#69)

Bugfix related to coordinates

• Make sure coordinates (latitude/longitude) gets converted to floats 48135f9

Timezone related bugfix

• Include timezone info for timestamps in search query #67

Update to Blog Search API v3

• Update Search client to Search API v3 #65

Query bugfixes and documentation improvements

• Query#start_time and Query#end_time can now be removed from a query #54
• Improvements to parser and timezone tests #52, 73d7cc5
• Sync documentation with other Search API clients

Improved time handling

• Post#published and Post#indexed are now returned as Time #50
• Query#start_time and Query#end_time are converted to UTC at query time #43, #46, #50