update travis ci build

Author: fstab

.travis.yml

@@ -11,6 +11,9 @@ os:
   - linux
   - osx
 
+dist:
+  - focal
+
 # oniguruma 5.9.6 was the default for a long time, and has slightly different API
 # oniguruma 6.9.4 is the current default on ubuntu 20.10 LTS
 # oniguruma 6.9.5-rev1 is the latest version, and the version used for the latest release
@@ -21,7 +24,6 @@ env:
     - ONIG_VERSION=6.9.4 MODE=STATIC
     - ONIG_VERSION=6.9.4 MODE=STATIC
     - ONIG_VERSION=6.9.5-rev1 MODE=STATIC
-    - ONIG_VERSION=DEFAULT MODE=STATIC
     - ONIG_VERSION=DEFAULT MODE=DYNAMIC
 
 before_install:

README.md

@@ -81,9 +81,9 @@ sudo apt-get install libonig-dev
 **Installing the Oniguruma library from source**
 
 ```bash
-curl -sLO https://github.com/kkos/oniguruma/releases/download/v6.9.4/onig-6.9.4.tar.gz
-tar xfz onig-6.9.4.tar.gz
-cd /tmp/onig-6.9.4
+curl -sLO https://github.com/kkos/oniguruma/releases/download/v6.9.5_rev1/onig-6.9.5-rev1.tar.gz
+tar xfz onig-6.9.5-rev1.tar.gz
+cd onig-6.9.5
 ./configure
 make
 make install