Update CRAN comments

cran-comments.md

@@ -1,16 +1,11 @@
 ## Test environments
 
-* local MacOS 10.15.1, R 3.6.3
-* local MacOS 10.15.1, R 4.0.0
-* Ubuntu 16.04 (on Travis-CI), R 3.6.0
+* local MacOS 10.15.3, R 3.6.3
+* local MacOS 10.15.3, R 4.0.0
+* Ubuntu 16.04 (on Travis-CI), R-release
 * Windows (on AppVayor), R-release
 * win-builder (R-release, R-devel)
-* R-hub
-    * Windows Server 2008 R2 SP1, R-devel, 32/64 bit
-    * Ubuntu Linux 16.04 LTS, R-release, GCC
-    * Fedora Linux, R-devel, clang, gfortran
-    * Debian Linux, R-release, GCC
-    * Debian Linux, R-devel, GCC ASAN/UBSAN
+* R-hub Windows Server 2008 R2 SP1, R-release, 32/64 bit
 
 ## R CMD check results
 
@@ -46,4 +41,5 @@ There are currently no downstream dependencies for this package.
 ## Resubmission
 This is a resubmission. In this version I have:
 
-* Fix a bug in documentation related to implicit coercion
+* Fix a bug in documentation and vignette related to the unsupported ticker in 
+  Yahoo Finance