merge pr #943: odbc v1.6.3

merge pr #939: odbc v1.6.2

v1.6.1 release candidate (#903)

* update NEWS
* update cran comments
* skip dependent tests without unixodbc
* Increment version number to 1.6.1

odbc v1.6.0 (#896)

Right before CRAN submission:

* polish NEWS

* `urlchecker::url_check()`

* resolve global variables NOTE

* re`document()`

* change 301ing URLs at their R source, too

* remove note on sys headers WARNING, update revdep count

* Resolve "\link{} targets missing package
anchors" NOTE

re`document()`s with dev DBI + adjusts one manual `\link{}` in a source file

* resolve "\link{} targets missing package" NOTE

Resolves:

```
* checking Rd cross-references ... NOTE
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  OdbcConnection.Rd: DBIObject-class, DBIDriver-class,
    DBIConnection-class, DBIResult-class, dbBind
  OdbcResult.Rd: DBIObject-class, DBIDriver-class, DBIConnection-class,
    DBIResult-class
  dbConnect-OdbcDriver-method.Rd: dbListTables, dbSendQuery,
    dbColumnInfo, dbFetch
  odbcConnectionColumns.Rd: dbListFields, dbWriteTable
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
```

Manually documents `@param dbObj` for a few methods rather than inheriting links to classes that don't resolve automatically.

* Increment version number to 1.6.0

---------

Co-authored-by: Hadley Wickham <[email protected]>

odbc v1.5.0 (#812)


---------

Co-authored-by: Hadley Wickham <[email protected]>

Increment version number to 1.4.2

odbc 1.4.1 release (#705)

* Polish news
* Rebuild readme
* Correctly wrap news
* Re-document
* Note about resubmission
* Increment version number to 1.4.1

Increment version number to 1.4.0

Increment version number to 1.3.5

Increment version number to 1.3.4