gnu: r-dbi: Update to 1.1.1.

* gnu/packages/statistics.scm (r-dbi): Update to 1.1.1.
[native-inputs]: Add r-knitr.

gnu/packages/statistics.scm

@@ -1268,14 +1268,16 @@ evaluation (NSE) in R.")
 (define-public r-dbi
   (package
     (name "r-dbi")
-    (version "1.1.0")
+    (version "1.1.1")
     (source (origin
               (method url-fetch)
               (uri (cran-uri "DBI" version))
               (sha256
                (base32
-                "1r03j9rdcxb9bhxk40dkmy10ikz4yzsxhy3f9k9ix3x577xbfvd9"))))
+                "0i0kfyg43nryyka2bjlgz4x75w965224qp36wz1hl7a2lswb6ajp"))))
     (build-system r-build-system)
+    (native-inputs
+     `(("r-knitr" ,r-knitr)))
     (home-page "https://github.com/rstats-db/DBI")
     (synopsis "R database interface")
     (description