bar: Use strtod instead of strtof
bar: Use strtod instead of strtof

This makes the function more consistent, since it actually returns a
double and it also fixes the tests that use EXPECT_DOUBLE_EQ

jaagr/lemonbuddy,jaagr/polybar,jaagr/polybar,jaagr/polybar,jaagr/lemonbuddy,jaagr/lemonbuddy