docs: update changelog and readme

Author: MEFRREEX

CHANGELOG.md

@@ -1,3 +1,6 @@
+# 3.1.0
+1. Added API for tooltips for custom elements (`ElementTooltip#getTooltip()` and `ElementTooltip#setTooltip(String tooltip)`)
+
 # 3.0.0
 1. Removed useless [constructors](https://github.com/MEFRREEX/FormConstructor/commit/a5ebafd0ae5fc3f7c9fb7a21d036b05662543814) and [methods](https://github.com/MEFRREEX/FormConstructor/commit/d080f3d4906064d439e0c6597dc6e5e6f1cb951a) from CustomForm, ModalForm
 2. Removed dependence on Nukkit forms + added FormService class

README.md

@@ -103,7 +103,8 @@ form.addElement(new Header("My Header"))
     .addElement(new Divider())
     .addElement("input", new Input("Input")
         .setPlaceholder("Text")
-        .setDefaultValue("Default value"))
+        .setDefaultValue("Default value")
+        .setTooltip("Input element tooltip"))
     .addElement("slider", new Slider("Slider", 1f, 100f, 1, 1))
     .addElement("stepslider", new StepSlider("Step slider")
         .addStep("1")
@@ -112,7 +113,8 @@ form.addElement(new Header("My Header"))
     .addElement("dropdown", new Dropdown("Dropdown")
         .addElement("Element 1")
         .addElement("Element 2")
-        .addElement("Element 3"))
+        .addElement("Element 3")
+        .setTooltip("Dropdown element tooltip"))
     .addElement("dropdown1", new Dropdown("Second dropdown", elements))
     .addElement("toggle", new Toggle("Toggle"));