default to timestamp with time zone for oracle

[vschoettke]

In relation to #184 I also changed the default for datetime(), timestamp(), timestamps()and time() to "timestamp with time zone" for the oracle dialect.
Like the postgres implementation, if the without param for datetime(name, [without]) or timestamp(name, [without]) is set to a truthy value then only "timestamp" is generated.

[vschoettke]

@tgriesser the code works fine but only updates the code in the src folder and the tests. I think the travis script should build the release (lib) files and then execute the tests. Currently making a pull request that breaks tests does not warn.

I would also favor getting rid of the of the lib folder/any files that are generated by the build script in the repository to avoid extra commits that just change the compiled/generated data.

[tgriesser]

Thanks!

I would also favor getting rid of the of the lib folder/any files that are generated by the build script in the repository to avoid extra commits that just change the compiled/generated data.

The reason I've kept them in is that it allows people to pick specific sha commit-ish as they have in the past in their package.json, rather than only relying on the npm releases.

[vschoettke]

@tgriesser If you don't update the build files every time you commit/merge, people will only get the npm releases anyways. Someone may also think a bug is fixed because it says so in the commit but it's still not fixed in the build files.

I also think the danger of merging something non-working and detecting it way later is too high.