readme/release notes/.gitignore updates

Author: kushti

.gitignore

@@ -3,6 +3,7 @@
 .ensime
 .ensime_cache/
 scorex.yaml
+.bsp
 
 # scala build folders
 target
@@ -13,3 +14,7 @@ target
 # logs
 scorex-errors.log
 *.log
+
+# local-only JS-related files and folders
+package-lock.json
+node_modules/

README.md

@@ -11,14 +11,14 @@ Use the repository as code examples for the trees also, though one code example
 
 ## Get Scrypto
 
-Scrypto is available on Sonatype for Scala 2.12:
+Scrypto is available on Sonatype for Scala 2.12 / 2.13:
 ```scala
 resolvers += "Sonatype Releases" at "https://oss.sonatype.org/content/repositories/releases/"
 ```
 
 You can use Scrypto in your sbt project by simply adding the following dependency to your build file:
 ```scala
-libraryDependencies += "org.scorexfoundation" %% "scrypto" % "2.2.0"
+libraryDependencies += "org.scorexfoundation" %% "scrypto" % "3.0.0"
 ```
 
 ### Hash functions
@@ -208,7 +208,11 @@ added 285 packages, and audited 286 packages in 20s
 found 0 vulnerabilities
 ```
 
-Then you can compile the library with SBT and run tests.
+Then you can compile the library with SBT and run tests. Please note that Scala-JS compilation of JavaScript code
+may consume a lot of memory, so makes sense to give more memory to SBT by e.g. running 
+`export SBT_OPTS="-Xmx3G -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=2G -Xss2M"` (to give 3G
+of RAM to it) before launching SBT.
+
 ```
 $sbt
 sbt:scrypto> compile

build.sbt

@@ -85,7 +85,7 @@ lazy val scryptoJS = scrypto.js
       Compile / npmDependencies ++= Seq(
         "@noble/hashes" -> "1.1.4"
       ),
-      useYarn := true
+      useYarn := false
     )
 
 lazy val benchmarks = project

release-notes.md

@@ -2,6 +2,7 @@
 **3.0.0**
 ---------
 
+* Javascript support via Scala.JS
 * CI configuration for Scala.js 
 * configuration of SBT with necessary JS dependencies (@noble/hashes) using ScalablyTyped
 * removed all Java dependencies in `shared` code (jvm still uses BouncyCastle)