Update helpers.sh

Add pull request tmux-plugins#89 
- Fix battery percentage output when using upower 
( tmux-plugins#89 )

Author: slange-dev

scripts/helpers.sh

@@ -61,3 +61,14 @@ battery_status() {
 		fi
 	fi
 }
+
+float2int() {
+	local float="$1"
+	if [[ $float =~ "," ]]; then
+		echo ${float%,*}
+	elif [[ $float =~ "." ]]; then
+		echo ${float%.*}
+	else
+		echo ${float//%}
+	fi
+}