Add gettext dependency

Author: btrkeks

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           packages: gcc-10 clang clang-format clang-tidy cppcheck liblmdb-dev libmecab-dev libgtk-3-dev \
             libx11-dev libcurl4-openssl-dev libnotify-dev libzip-dev zipcmp zipmerge ziptool libcgreen1-dev \
-            gperf
+            gperf gettext
           version: 1.0
 
       - run: gcc --version

README.md

@@ -38,7 +38,8 @@ First make sure, that you have all necessary dependencies installed. On a Debian
 
 ```
 sudo apt-get install liblmdb-dev libmecab-dev libgtk-3-dev libx11-dev \
-     libcurl4-openssl-dev libnotify-dev libzip-dev zipcmp zipmerge ziptool gperf
+     libcurl4-openssl-dev libnotify-dev libzip-dev zipcmp zipmerge ziptool \
+     gperf gettext
 ```
 
 Then install with: