Upgrade Pants to 1.8.0rc0 (#876)

pants.ini

@@ -2,7 +2,7 @@
 local_artifact_cache: %(pants_bootstrapdir)s/artifact_cache
 
 [GLOBAL]
-pants_version: 1.2.1
+pants_version: 1.8.0rc0
 
 [cache]
 read_from: ["%(local_artifact_cache)s"]
@@ -23,17 +23,15 @@ platforms: {
     'java8': {'source': '8', 'target': '8', 'args': [] },
   }
 
-[compile.scalafmt]
-skip: True
-
 [compile.zinc]
 jvm_options: [
     '-Xss10M', '-Xms5500m', '-Xmx5500m', '-XX:MaxMetaspaceSize=512m', '-XX:+UseParallelOldGC', '-XX:ParallelGCThreads=4',
     '-XX:NewSize=2000m', '-XX:NewRatio=2', '-XX:SurvivorRatio=8',
-
-    # TODO: Remove after https://github.com/pantsbuild/pants/issues/4477 is pulled in.
-    '-Dzinc.analysis.cache.limit=5000',
   ]
 
+[resolver]
+resolver: coursier
+
 [test.junit]
-jvm_options = ['-Xmx2048m']
+jvm_options = ['-Xmx2048m']
+