fix(ng-update): migrations not running for release candidate versions

7a433f6 set up the migrations for v9, but
we actually forgot that we want to run migrations in the next and RC versions too.

Author: devversion

src/cdk/schematics/migration.json

@@ -2,22 +2,22 @@
   "$schema": "./node_modules/@angular-devkit/schematics/collection-schema.json",
   "schematics": {
     "migration-v6": {
-      "version": "6",
+      "version": "6.0.0",
       "description": "Updates the Angular CDK to v6",
       "factory": "./ng-update/index#updateToV6"
     },
     "migration-v7": {
-      "version": "7",
+      "version": "7.0.0",
       "description": "Updates the Angular CDK to v7",
       "factory": "./ng-update/index#updateToV7"
     },
     "migration-v8": {
-      "version": "8-beta",
+      "version": "8.0.0",
       "description": "Updates the Angular CDK to v8",
       "factory": "./ng-update/index#updateToV8"
     },
     "migration-v9": {
-      "version": "9",
+      "version": "9.0.0-0",
       "description": "Updates the Angular CDK to v9",
       "factory": "./ng-update/index#updateToV9"
     },

src/material/schematics/migration.json

@@ -2,22 +2,22 @@
   "$schema": "./node_modules/@angular-devkit/schematics/collection-schema.json",
   "schematics": {
     "migration-v6": {
-      "version": "6",
+      "version": "6.0.0",
       "description": "Updates Angular Material to v6",
       "factory": "./ng-update/index#updateToV6"
     },
     "migration-v7": {
-      "version": "7",
+      "version": "7.0.0",
       "description": "Updates Angular Material to v7",
       "factory": "./ng-update/index#updateToV7"
     },
     "migration-v8": {
-      "version": "8-beta",
+      "version": "8.0.0",
       "description": "Updates Angular Material to v8",
       "factory": "./ng-update/index#updateToV8"
     },
     "migration-v9": {
-      "version": "9",
+      "version": "9.0.0-0",
       "description": "Updates Angular Material to v9",
       "factory": "./ng-update/index#updateToV9"
     },