Gulp imagemin prints error because it affects not only .png files

Question

Gulp imagemin prints error because it affects .svg files along with .png images.

The error is:

[19:37:49] gulp-imagemin: Minified 0 images
events.js:167
      throw er; // Unhandled 'error' event
      ^

Error: Unsupported file type: image/svg+xml
    at doParse (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\get-pixels\node-pixels.js:126:10)
    at getPixels (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\get-pixels\node-pixels.js:140:5)
    at handleFileBuffer (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\pixelsmith\lib\engine.js:45:13)
    at ConcatStream.<anonymous> (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\pixelsmith\node_modules\concat-stream\index.js:36:43)
    at ConcatStream.emit (events.js:182:13)
    at finishMaybe (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\pixelsmith\node_modules\readable-stream\lib\_stream_writable.js:475:14)
    at afterWrite (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\pixelsmith\node_modules\readable-stream\lib\_stream_writable.js:361:3)
    at process._tickCallback (internal/process/next_tick.js:63:19)
Emitted 'error' event at:
    at done (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:202:25)
    at C:\Users\ndruce\Desktop\Проекты\revton\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:139:7
    at handleImages (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\gulp.spritesmith\lib\gulp-spritesmith.js:196:16)
    at C:\Users\ndruce\Desktop\Проекты\revton\node_modules\gulp.spritesmith\node_modules\async\dist\async.js:3694:9
    at C:\Users\ndruce\Desktop\Проекты\revton\node_modules\gulp.spritesmith\node_modules\async\dist\async.js:359:16
    at iteratorCallback (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\gulp.spritesmith\node_modules\async\dist\async.js:933:13)
    at C:\Users\ndruce\Desktop\Проекты\revton\node_modules\gulp.spritesmith\node_modules\async\dist\async.js:843:16
    at C:\Users\ndruce\Desktop\Проекты\revton\node_modules\gulp.spritesmith\node_modules\async\dist\async.js:3691:13
    at apply (C:\Users\ndruce\Desktop\Проекты\revton\node_modules\gulp.spritesmith\node_modules\async\dist\async.js:21:25)
    at C:\Users\ndruce\Desktop\Проекты\revton\node_modules\gulp.spritesmith\node_modules\async\dist\async.js:56:12

Gulp part of code:

gulp.task('img:build', function () {
    gulp.src('src/img/**/*.{png}')
        .pipe(plumber())
        .pipe(imagemin({
            progressive: true,
            svgoPlugins: [{removeViewBox: false}],
            use: [pngquant()],
            interlaced: true
        }))
        .pipe(gulp.dest(path.build.img))
        .pipe(reload({stream: true}));
});

What is the solution for this problem? I just want to recursively optimize .png images.