fix: proleptic java.time support

[marschall]

Make the java.time support proleptic by not going through
TimestampUtils.toJavaSecs when in binary mode.

Fixes #1534

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Changes to Existing Features:

• Does this break existing behaviour? For timestamps in the Julian calendar different java.time objects are returned. Code relying on the old (buggy) behavior will break.
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[AppVeyorBot]

✅ Build pgjdbc 1.0.385 completed (commit 005379f0a9 by @marschall)

[marschall]

Some comments about the change:

• I wanted the keep the existing #toJavaSecs and #toPgSecs logic for the old data types. That's why I factored out the binary parsing.
• Binding does not go through TimestampUtils#toPgSecs because binary binding for java.time types is currently not implemented. I would like to address this in a different change.
• SetObject310Test had a bug where it would ignore the second column
• I skip the tests on anything before 8.4. Writing test that also work on older versions would be harder because
  • timestamp and timestamptz support in generate_series was added in 8.4
  • CTE support in added in 8.4

[AppVeyorBot]

✅ Build pgjdbc 1.0.386 completed (commit b482339489 by @marschall)

[codecov-io]

Codecov Report

Merging #1539 into master will increase coverage by 0.03%.
The diff coverage is 70.83%.

@@             Coverage Diff              @@
##             master    #1539      +/-   ##
============================================
+ Coverage     68.94%   68.97%   +0.03%     
- Complexity     3956     3972      +16     
============================================
  Files           179      179              
  Lines         16491    16546      +55     
  Branches       2678     2688      +10     
============================================
+ Hits          11369    11412      +43     
- Misses         3877     3887      +10     
- Partials       1245     1247       +2

[AppVeyorBot]

✅ Build pgjdbc 1.0.387 completed (commit 6cc67e1971 by @marschall)

[AppVeyorBot]

✅ Build pgjdbc 1.0.388 completed (commit bb5228d277 by @marschall)

[AppVeyorBot]

✅ Build pgjdbc 1.0.394 completed (commit 882bbab3ac by @marschall)