Update changelog

Author: hc-github-team-tf-provider-devex

.changes/0.18.0.md

@@ -0,0 +1,12 @@
+## 0.18.0 (July 03, 2023)
+
+ENHANCEMENTS:
+
+* tftypes: Added `AttributePath` type `NextStep()` method, which returns the next step in the path without first copying via `Steps()` ([#307](https://github.com/hashicorp/terraform-plugin-go/issues/307))
+
+BUG FIXES:
+
+* tftypes: Significantly reduced compute and memory usage of `Value` type walking and transformation ([#307](https://github.com/hashicorp/terraform-plugin-go/issues/307))
+* tftypes: Removed unnecessary memory allocations from `AttributePath` type `Equal()`, `LastStep()`, and `WithoutLastStep()` methods ([#307](https://github.com/hashicorp/terraform-plugin-go/issues/307))
+* tftypes: Removed unnecessary memory allocations from `NewValue()` function ([#307](https://github.com/hashicorp/terraform-plugin-go/issues/307))
+

.changes/unreleased/BUG FIXES-20230630-103655.yaml

@@ -1,3 +1,15 @@
+## 0.18.0 (July 03, 2023)
+
+ENHANCEMENTS:
+
+* tftypes: Added `AttributePath` type `NextStep()` method, which returns the next step in the path without first copying via `Steps()` ([#307](https://github.com/hashicorp/terraform-plugin-go/issues/307))
+
+BUG FIXES:
+
+* tftypes: Significantly reduced compute and memory usage of `Value` type walking and transformation ([#307](https://github.com/hashicorp/terraform-plugin-go/issues/307))
+* tftypes: Removed unnecessary memory allocations from `AttributePath` type `Equal()`, `LastStep()`, and `WithoutLastStep()` methods ([#307](https://github.com/hashicorp/terraform-plugin-go/issues/307))
+* tftypes: Removed unnecessary memory allocations from `NewValue()` function ([#307](https://github.com/hashicorp/terraform-plugin-go/issues/307))
+
 ## 0.17.0 (June 28, 2023)
 
 ENHANCEMENTS: