chore: use tildes for pre-v1 deps

Author: achingbrain

package.json

@@ -40,12 +40,12 @@
     "aegir": "^13.0.6",
     "async": "^2.6.0",
     "chai": "^4.1.2",
-    "cids": "^0.5.3",
+    "cids": "~0.5.3",
     "dirty-chai": "^2.0.1",
     "ipfs-block": "~0.7.1",
-    "ipfs-repo": "~0.19.0",
+    "ipfs-repo": "~0.21.0",
     "lodash": "^4.17.5",
-    "multihashing-async": "~0.4.8",
+    "multihashing-async": "~0.5.0",
     "ncp": "^2.0.0",
     "pre-commit": "^1.2.2",
     "rimraf": "^2.6.2"