Prepare to release intl null safety

PiperOrigin-RevId: 338066278

CHANGELOG.md

@@ -1,11 +1,9 @@
-## 0.17.0-nullsafety-dev
+## 0.17.0-nullsafety
 
-* Migrate to null safety.
-* Add `@pragma('vm:prefer-inline')` to `Intl` methods that already have
+ * Migrate to null safety.
+ * Add `@pragma('vm:prefer-inline')` to `Intl` methods that already have
    `@pragma('dart2js:tryInline')`, for the same reason: to help omit message
    descriptions from compiled output.
-
-## 0.17.0
  * **Breaking Change** [#123][]: Fix parsing of two-digit years to match the
    documented behavior. Previously a two-digit year would be parsed to a value
    in the range [0, 99]. Now it is parsed relative to the current date,
@@ -18,7 +16,7 @@
 ## 0.16.2
  * Fix bug with dates in January being treated as ordinal. e.g. 2020-01-32 would
    be accepted as valid and the day treated as day-of-year.
- * Compact currency formats will avoid displaying unecessary trailing zeros
+ * Compact currency formats will avoid displaying unnecessary trailing zeros
    in compact formats for currencies which specify decimal places.
 
 ## 0.16.1

pubspec.yaml

@@ -1,5 +1,5 @@
 name: intl
-version: 0.17.0-nullsafety-dev
+version: 0.17.0-nullsafety
 homepage: https://github.com/dart-lang/intl
 description: >-
   Contains code to deal with internationalized/localized messages, date and