Always set exact version when publishing

Theia is using "^1.x.y" in all modules, this causes two problems
1) Since romantic versioning is used within Theia repo, API
   breakage might be introduced between any version

2) It's harder to build applications using old versions of Theia
   extensions since if not every needed Theia extension is explicitly
   stated in dependencies you will likely end up with pulling several
   parallel versions of @theia/core for example. Due to dependency
   injection we can not have multiple parallel versions of the same
   Theia extension module

Fixes issue #8879 when publishing next version

Contributed by STMicroelectronics

Signed-off-by: Niklas DAHLQUIST <niklas.dahlquist@st.com>
Signed-off-by: Samuel HULTGREN <samuel.hultgren@st.com>

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## v1.10.0
 
 - [plugin] added `createDeployQuickOpenItem` method to create `DeployQuickOpenItem` in order to make extension deploy command extensible [#8919] (https://github.com/eclipse-theia/theia/pull/8919)
+- [dependencies] updated to use fixed versions when publishing, `"x.y.z"` instead of `"^x.y.z"` in dependencies [#8880](https://github.com/eclipse-theia/theia/pull/8880)
 
 ## v1.9.0 - 16/12/2020
 

package.json

@@ -68,7 +68,7 @@
     "rebuild:electron": "theia rebuild:electron",
     "rebuild:electron:debug": "DEBUG=electron-rebuild && yarn rebuild:electron",
     "publish": "yarn && yarn test && yarn publish:latest",
-    "publish:latest": "lerna publish && yarn publish:check",
+    "publish:latest": "lerna publish --exact && yarn publish:check",
     "publish:next": "yarn next:publish && yarn next:publish --skip-npm && yarn publish:check",
     "next:publish": "lerna publish --exact --canary=next --npm-tag=next --yes",
     "publish:check": "node scripts/check-publish.js",