gnu: r-collapse: Update to 2.0.6.

* gnu/packages/cran.scm (r-collapse): Update to 2.0.6.

Change-Id: Id3522ad2adc4d50d1ce4eeb3406c1bdb7177bbfd

gnu/packages/cran.scm

@@ -391,13 +391,13 @@ labels on the node can also be achieved.")
 (define-public r-collapse
   (package
     (name "r-collapse")
-    (version "2.0.3")
+    (version "2.0.6")
     (source
      (origin
        (method url-fetch)
        (uri (cran-uri "collapse" version))
        (sha256
-        (base32 "16y4qxqr4k04690xn8s6c9fr3igpk34pgxygxkc41gc1na0ym37v"))))
+        (base32 "0azyl6667dzwns9knp3fplv6f9nav36wsrv42qzv90p5kzcaa872"))))
     (properties `((upstream-name . "collapse")))
     (build-system r-build-system)
     (propagated-inputs (list r-rcpp))