Update changelog

Deliberately not logged:

c63d8a8 5786026 9832958 9b1cb33 b12ba42
5d57011 960b0a1 2f94362

docs/announce/2020.01.md

@@ -27,9 +27,6 @@ New in 2020.01:
     + Smartmatching typed Arrays against same-typed Positionals now
       returns True (e.g. `Array[Str:D] ~~ Positional[Str:D]`), which
       returned False before [fb55ae29]
-    + Packages are now exported by user given names. For `class A::B
-      is export {}` the export trait would use `A::B` part even if the class
-      is declared inside another named package.[57860269]
     + Class attributes and methods are now prioritized over those from
       roles [f19e2ee5][2fc87db1][4c265c7c][9357eddb][83d26ddd][9f2a2f6a][55b51a24]
     + DateTime class now accepts picosecond precision [9eef0e63]
@@ -53,6 +50,7 @@ New in 2020.01:
     + Fix calling a qualified method from role on JVM backend [5648a4f3]
     + Fix `roundrobin` method, cross and zip operators on a 1-element
       lists [f602c02c][737dd1b1][87de5ee4]
+    + Make MoarVM::Profiler.report work again [734047a0]
   + Additions:
     + Allow user to retain formatting of Pod6 leading declarator
       blocks (`#|`) using RAKUDO_POD_DECL_BLOCK_USER_FORMAT env var,
@@ -91,6 +89,12 @@ New in 2020.01:
       [75056dfa][8b7d0651][52a7bab9][d7d9a2f4][470c9b7e]
     + Skip 'make test' on JVM backend [e5627b83]
   + Efficiency:
+    + Make `Str.raku` between 1.5x to 100x as fast [09e66e50]
+    + Make `Mu.raku` about 40% faster [585227ee]
+    + Make `Pair.raku` about 15% faster [0d96bedc]
+    + Make `Pair.raku` between 0 and 10% faster [08aec410]
+    + Make `IntStr.raku` about 2x as fast [2261ef11]
+    + Make `NumStr.raku` about 60% faster [e262da1d]
     + Made `Str.chomp` between 10x and 100x faster [b9c0196f]
     + Made `Str.chop(N)` between 3x and 17x faster [b569e112]
     + Made `Str.chop` between 1.8x and 30x faster [f1963623]
@@ -138,6 +142,8 @@ New in 2020.01:
       [cfb655bc][b1a68be4][74aea829][80cbb3ef][83423ea0][d38cfef3]
       [d406d834][62bd2743][6bf6d347][e4efccc6][6f527cea][b7888d79]
       [7ce79f4d][5f335aa4][9a5579ff][784daae2][add2ec0d][abcf37f2]
+      [b9fa673b][3d432429][f06c2426][f1abe9c6][bd2e0c7a][22905592]
+      [8c4244f6][829f4ccb][4f48e3a5]
 
 
 The following people contributed to this release: