Restore version ranges for `@hypothesis` packages in `package.json`

We've been hand-managing the versions of the `frontend-shared` and
`frontend-build` packages in such a way that they are effectively
"pinned" to a single version. Restore version ranges such that automated
tools like dependabot are able to do their jobs and we don't end up with
unintentionally stale dependencies.

package.json

@@ -11,8 +11,8 @@
     "@babel/preset-env": "^7.1.6",
     "@babel/preset-react": "^7.0.0",
     "@babel/preset-typescript": "^7.16.7",
-    "@hypothesis/frontend-build": "1.2.0",
-    "@hypothesis/frontend-shared": "5.6.0",
+    "@hypothesis/frontend-build": "^1.2.0",
+    "@hypothesis/frontend-shared": "^5.6.0",
     "@npmcli/arborist": "^6.1.1",
     "@octokit/rest": "^19.0.3",
     "@rollup/plugin-babel": "^6.0.0",

yarn.lock

@@ -1129,7 +1129,7 @@
   resolved "https://registry.yarnpkg.com/@humanwhocodes/object-schema/-/object-schema-1.2.1.tgz#b520529ec21d8e5945a1851dfd1c32e94e39ff45"
   integrity sha512-ZnQMnLV4e7hDlUvw8H+U8ASL02SS2Gn6+9Ac3wGGLIe7+je2AeAOxPY+izIPJDfFDb7eDjev0Us8MO1iFRN8hA==
 
-"@hypothesis/frontend-build@1.2.0":
+"@hypothesis/frontend-build@^1.2.0":
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/@hypothesis/frontend-build/-/frontend-build-1.2.0.tgz#2938212d0ac655484692e9fbcac26f301d8b3638"
   integrity sha512-iPNS6bkXVujNEKUUSaFLgoQU38qfH5zA3ox9gUP2rVTWuU8Tt2VsZDp+MiPcqFSqV3WVkBWM/aydoCKUgetA7A==
@@ -1138,7 +1138,7 @@
     fancy-log "^1.3.3"
     glob "^7.2.0"
 
-"@hypothesis/frontend-shared@5.6.0":
+"@hypothesis/frontend-shared@^5.6.0":
   version "5.6.0"
   resolved "https://registry.yarnpkg.com/@hypothesis/frontend-shared/-/frontend-shared-5.6.0.tgz#b0158ebefe06699918e4c9af807f09100f193670"
   integrity sha512-tjtyVSoTwFalYc4R9vFob1zWdvZpH9rfOC2fiMO0SlTEL9D0pgP9XdGc57dS8RsxWAtNaaDw/C0PB8i2keEWiQ==