docs: update README changelog entry to v0.136.0

Rename the v0.132.0 entry to v0.136.0 (the upcoming release for this
PR), move it above v0.135.0 for chronological order, and add the
UnevaluatedItems/UnevaluatedProperties → BoolSchema type change.

Addresses fenollp's review on getkin#1125.

Author: reuvenharrison

README.md

@@ -313,6 +313,11 @@ for _, path := range doc.Paths.InMatchingOrder() {
 
 ## CHANGELOG: Sub-v1 breaking API changes
 
+### v0.136.0
+* `openapi3.Schema.ExclusiveMin` and `openapi3.Schema.ExclusiveMax` fields changed from `bool` to `ExclusiveBound` (a union type holding `*bool` for OpenAPI 3.0 or `*float64` for OpenAPI 3.1).
+* `openapi3.Schema.PrefixItems` field changed from `[]*SchemaRef` to `SchemaRefs`.
+* `openapi3.Schema.UnevaluatedItems` and `openapi3.Schema.UnevaluatedProperties` fields changed from `*SchemaRef` to `BoolSchema` (a union type accepting either a boolean or a schema object).
+
 ### v0.135.0
 * `openapi3.MediaType.Encoding` field type changed from `map[string]*Encoding` to `Encodings`
 * `openapi3.Server.Variables` field type changed from `map[string]*ServerVariable` to `ServerVariables`
@@ -321,9 +326,6 @@ for _, path := range doc.Paths.InMatchingOrder() {
 * `openapi3.Location` gained `File` and `Name` fields (`string` type, replacing previous `int`-only struct layout)
 * `openapi3.Origin` gained `Sequences` field (`map[string][]Location`, extending previous `map[string]Location`-only struct)
 
-### v0.132.0
-* `openapi3.Schema.ExclusiveMin` and `openapi3.Schema.ExclusiveMax` fields changed from `bool` to `ExclusiveBound` (a union type holding `*bool` for OpenAPI 3.0 or `*float64` for OpenAPI 3.1).
-* `openapi3.Schema.PrefixItems` field changed from `[]*SchemaRef` to `SchemaRefs`.
 ### v0.131.0
 * No longer `openapi3filter.RegisterBodyDecoder` the `openapi3filter.ZipFileBodyDecoder` by default.