Granular point scale (#611)

* decrease point scale signal granularity

* version patch

packages/sanddance-specs/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@msrvida/sanddance-specs",
-  "version": "1.8.0",
+  "version": "1.8.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@msrvida/sanddance-specs",
-      "version": "1.8.0",
+      "version": "1.8.1",
       "license": "MIT",
       "dependencies": {
         "vega-typings": "~0.24.1"

packages/sanddance-specs/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@msrvida/sanddance-specs",
-  "version": "1.8.0",
+  "version": "1.8.1",
   "description": "SandDance Vega specification generator.",
   "main": "dist/es6/index.js",
   "repository": {

packages/sanddance-specs/src/layouts/scatter.ts

@@ -93,7 +93,7 @@ export class Scatter extends Layout {
                     input: 'range',
                     min: 1,
                     max: 10,
-                    step: 1,
+                    step: 0.1,
                 },
             },
             {