try fix windows UTF-8 issue

Author: yannrichet

.github/workflows/ant.yml

@@ -22,7 +22,7 @@ jobs:
         java-package: jdk
     - uses: r-lib/actions/setup-r@v1
       with:
-        r-version: 3.6
+        r-version: 
     - if: matrix.os == 'macos-latest'
       run: |
         ln -s /Library/Frameworks/R.framework/Versions/3.6 /Library/Frameworks/R.framework/Versions/3.5

src/main/doe/Morris.R

@@ -2,7 +2,7 @@
 #help: Morris's Elementary Effects Screening Method
 #type: sensitivity
 #authors: Gilles Pujol, with contributions from Frank Weber (2016)
-#references: M. D. Morris, 1991, Factorial sampling plans for preliminary computational experiments, Technometrics, 33, 161–174.
+#references: M. D. Morris, 1991, Factorial sampling plans for preliminary computational experiments, Technometrics, 33, 161-174.
 #require: sensitivity; xtable; jsonlite
 #options: r='10';levels='4';seed='1'
 #options.help: r=integer giving the number of repetitions of the design; levels=integer specifying the number of levels of the design; seed=random seed