added jspm version lock because of SystemJS 0.20 breaking changes

fixes #38

Author: piotrwitek

package.json

@@ -46,7 +46,7 @@
     "@types/whatwg-fetch": "^0.0.32",
     "husky": "^0.11.8",
     "jest": "^17.0.3",
-    "jspm": "^0.17.0-beta.32",
+    "jspm": "0.17.0-beta.32",
     "jspm-hmr": "^0.5.0",
     "regenerator": "^0.9.5",
     "shelljs": "^0.7.5",

yarn.lock

@@ -2236,7 +2236,7 @@ jspm-registry@^0.4.1:
     rsvp "^3.0.18"
     semver "^4.3.3"
 
-jspm@^0.17.0-beta.32:
+jspm@0.17.0-beta.32:
   version "0.17.0-beta.32"
   resolved "https://registry.yarnpkg.com/jspm/-/jspm-0.17.0-beta.32.tgz#53e8a18b6f4aeb689d3ee3b527e390301a2ae727"
   dependencies:
@@ -3039,9 +3039,9 @@ read-pkg@^1.0.0:
     normalize-package-data "^2.3.2"
     path-type "^1.0.0"
 
-readable-stream@^2.0.0, "readable-stream@^2.0.0 || ^1.1.13", readable-stream@^2.0.2, readable-stream@^2.0.5:
-  version "2.2.2"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.2.2.tgz#a9e6fec3c7dda85f8bb1b3ba7028604556fc825e"
+readable-stream@^2.0.0, "readable-stream@^2.0.0 || ^1.1.13", readable-stream@~2.1.4:
+  version "2.1.5"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.1.5.tgz#66fa8b720e1438b364681f2ad1a63c618448c9d0"
   dependencies:
     buffer-shims "^1.0.0"
     core-util-is "~1.0.0"
@@ -3051,16 +3051,7 @@ readable-stream@^2.0.0, "readable-stream@^2.0.0 || ^1.1.13", readable-stream@^2.
     string_decoder "~0.10.x"
     util-deprecate "~1.0.1"
 
-readable-stream@~1.1.9:
-  version "1.1.14"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.1.14.tgz#7cf4c54ef648e3813084c636dd2079e166c081d9"
-  dependencies:
-    core-util-is "~1.0.0"
-    inherits "~2.0.1"
-    isarray "0.0.1"
-    string_decoder "~0.10.x"
-
-readable-stream@~2.0.0, readable-stream@~2.0.5:
+readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@~2.0.0, readable-stream@~2.0.5:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
   dependencies:
@@ -3071,17 +3062,14 @@ readable-stream@~2.0.0, readable-stream@~2.0.5:
     string_decoder "~0.10.x"
     util-deprecate "~1.0.1"
 
-readable-stream@~2.1.4:
-  version "2.1.5"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.1.5.tgz#66fa8b720e1438b364681f2ad1a63c618448c9d0"
+readable-stream@~1.1.9:
+  version "1.1.14"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.1.14.tgz#7cf4c54ef648e3813084c636dd2079e166c081d9"
   dependencies:
-    buffer-shims "^1.0.0"
     core-util-is "~1.0.0"
     inherits "~2.0.1"
-    isarray "~1.0.0"
-    process-nextick-args "~1.0.6"
+    isarray "0.0.1"
     string_decoder "~0.10.x"
-    util-deprecate "~1.0.1"
 
 readdirp@^2.0.0:
   version "2.1.0"