Update changelog

See gh-387

src/main/resources/changelog.txt

@@ -1,6 +1,41 @@
 Spring Vault Changelog
 =============================
 
+Changes in version 2.1.2.RELEASE
+-----------------------------------------
+* Upgrade to Vault 1.0.0-beta2 #335
+* Upgrade to Vault 1.0.0-rc1 #336
+* Replace own Base64 class with Spring's Base64Utils #344
+* Remove code duplicates from VaultWrappingTemplate #345
+* Update copyright years to 2019 #348
+* Upgrade to Vault 1.0.1 #349
+* Update dependencies #351
+* Upgrade to Spring Framework 5.1.4.RELEASE #352
+* Upgrade to Spring Data Lovelace SR4 #353
+* Upgrade to Project Reactor Californium SR4 #354
+* Upgrade to Spring Security 5.1.3.RELEASE #355
+* Upgrade to assetj-core 3.11.1 #356
+* Upgrade to mockito-core 2.23.4 #357
+* Upgrade to maven-jar-plugin 3.1.1 #358
+* Upgrade to asciidoctor-maven-plugin 1.5.7.1 #361
+* Upgrade to maven-assembly-plugin 3.1.1 #362
+* Upgrade springNext version to 5.1.5.BUILD-SNAPSHOT #363
+* Upgrade to Vault 1.0.2 #366
+* Upgrade to Jackson 2.9.8 #368
+* Improve documentation on Token authentication, renewal and SessionManager use #369
+* Upgrade to Vault 1.0.3 #371
+* Upgrade to Spring Framework 5.1.5 #374
+* Upgrade to Spring Data Lovelace SR5 #375
+* Upgrade to Reactor Californium SR5 #376
+* PrefixAwareUriBuilderFactory injects Vault port into absolute URL's #377
+* Consistently use https for linkable resources #381
+* Upgrade to Spring Security 5.1.4 #382
+* Upgrade to Apache HttpClient 4.5.7  #383
+* Upgrade to Apache HttpCore 4.4.11 #384
+* Upgrade to AWS SDK 1.11.507 #385
+* Upgrade to Lombok  1.18.6 #386
+* Release Spring Vault 2.1.2.RELEASE #387
+
 Changes in version 2.1.1.RELEASE
 -----------------------------------------
 * Fix aws -> kubernetes typo #317