chore!: Update constraints for Flutter SDK to 3.27.0

pubspec.yaml

@@ -8,7 +8,7 @@ documentation: https://github.com/imaNNeo/fl_chart
 
 environment:
   sdk: ^3.2.0
-  flutter: '>=3.16.0'
+  flutter: ">=3.27.0"
 
 funding:
   - https://github.com/sponsors/imaNNeo
@@ -28,21 +28,21 @@ dev_dependencies:
   very_good_analysis: ^6.0.0
 
 screenshots:
-  - description: 'FL Chart Logo'
+  - description: "FL Chart Logo"
     path: pub_screenshots/logo_1024.png
-  - description: 'LineChartSample1 and LineChartSample2'
+  - description: "LineChartSample1 and LineChartSample2"
     path: pub_screenshots/line_chart.jpg
-  - description: 'LineChartSample10'
+  - description: "LineChartSample10"
     path: pub_screenshots/line_chart_sample_10.gif
-  - description: 'BarChartSample1 and BarChartSample2'
+  - description: "BarChartSample1 and BarChartSample2"
     path: pub_screenshots/bar_chart.jpg
-  - description: 'BarChartSample7'
+  - description: "BarChartSample7"
     path: pub_screenshots/bar_chart_sample_7.gif
-  - description: 'PieChartSample1, PieChartSample2 and PieChartSample3'
+  - description: "PieChartSample1, PieChartSample2 and PieChartSample3"
     path: pub_screenshots/pie_chart.jpg
-  - description: 'ScatterChartSample2'
+  - description: "ScatterChartSample2"
     path: pub_screenshots/scatter_chart_sample_2.gif
-  - description: 'RadarChartSample1'
+  - description: "RadarChartSample1"
     path: pub_screenshots/radar_chart_sample_1.jpg
 
 topics:
@@ -51,4 +51,3 @@ topics:
   - visualization
   - graph
   - diagram
-